sertraline HCl 50 MG Oral Tablet

WARNINGS

Clinical Worsening and Suicide Risk Patients with major depressive disorder (MDD), both adult and pediatric, may experience worsening of their depression and/or the emergence of suicidal ideation and behavior (suicidality) or unusual changes in behavior, whether or not they are taking antidepressant medications, and this risk may persist until significant remission occurs.

Suicide is a known risk of depression and certain other psychiatric disorders, and these disorders themselves are the strongest predictors of suicide.

There has been a long-standing concern, however, that antidepressants may have a role in inducing worsening of depression and the emergence of suicidality in certain patients during the early phases of treatment.

Pooled analyses of short-term placebo-controlled trials of antidepressant drugs (SSRIs and others) showed that these drugs increase the risk of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults (ages 18-24) with major depressive disorder (MDD) and other psychiatric disorders.

Short-term studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24; there was a reduction with antidepressants compared to placebo in adults aged 65 and older.

The pooled analyses of placebo-controlled trials in children and adolescents with MDD, obsessive compulsive disorder (OCD), or other psychiatric disorders included a total of 24 short-term trials of 9 antidepressant drugs in over 4400 patients.

The pooled analyses of placebo-controlled trials in adults with MDD or other psychiatric disorders included a total of 295 short-term trials (median duration of 2 months) of 11 antidepressant drugs in over 77,000 patients.

There was considerable variation in risk of suicidality among drugs, but a tendency toward an increase in the younger patients for almost all drugs studied.

There were differences in absolute risk of suicidality across the different indications, with the highest incidence in MDD.

The risk differences (drug vs placebo), however, were relatively stable within age strata and across indications.

The risk differences (drug-placebo differences in the number of cases of suicidality per 1000 patients treated) are provided in Table 1.

Table 1 Age Range Drug-Placebo Difference in Number of Cases of Suicidality per 1000 Patients Treated Increases Compared to Placebo <18 14 additional cases 18–24 5 additional cases Decreases Compared to Placebo 25–64 1 fewer case ≥65 6 fewer cases No suicides occurred in any of the pediatric trials.

There were suicides in the adult trials, but the number was not sufficient to reach any conclusion about drug effect on suicide.

It is unknown whether the suicidality risk extends to longer-term use, i.e., beyond several months.

However, there is substantial evidence from placebo-controlled maintenance trials in adults with depression that the use of antidepressants can delay the recurrence of depression.

All patients being treated with antidepressants for any indication should be monitored appropriately and observed closely for clinical worsening, suicidality, and unusual changes in behavior, especially during the initial few months of a course of drug therapy, or at times of dose changes, either increases or decreases.

The following symptoms, anxiety, agitation, panic attacks, insomnia, irritability, hostility, aggressiveness, impulsivity, akathisia (psychomotor restlessness), hypomania, and mania, have been reported in adult and pediatric patients being treated with antidepressants for major depressive disorder as well as for other indications, both psychiatric and nonpsychiatric.

Although a causal link between the emergence of such symptoms and either the worsening of depression and/or the emergence of suicidal impulses has not been established, there is concern that such symptoms may represent precursors to emerging suicidality.

Consideration should be given to changing the therapeutic regimen, including possibly discontinuing the medication, in patients whose depression is persistently worse, or who are experiencing emergent suicidality or symptoms that might be precursors to worsening depression or suicidality, especially if these symptoms are severe, abrupt in onset, or were not part of the patient’s presenting symptoms.

If the decision has been made to discontinue treatment, medication should be tapered, as rapidly as is feasible, but with recognition that abrupt discontinuation can be associated with certain symptoms (see PRECAUTIONS and DOSAGE AND ADMINISTRATION—Discontinuation of Treatment with sertraline hydrochloride, for a description of the risks of discontinuation of sertraline hydrochloride).

Families and caregivers of patients being treated with antidepressants for major depressive disorder or other indications, both psychiatric and nonpsychiatric , should be alerted about the need to monitor patients for the emergence of agitation, irritability, unusual changes in behavior, and the other symptoms described above, as well as the emergence of suicidality, and to report such symptoms immediately to health care providers.

Such monitoring should include daily observation by families and caregivers.

Prescriptions for sertraline hydrochloride should be written for the smallest quantity of tablets consistent with good patient management, in order to reduce the risk of overdose.

Screening Patients for Bipolar Disorder A major depressive episode may be the initial presentation of bipolar disorder.

It is generally believed (though not established in controlled trials) that treating such an episode with an antidepressant alone may increase the likelihood of precipitation of a mixed/manic episode in patients at risk for bipolar disorder.

Whether any of the symptoms described above represent such a conversion is unknown.

However, prior to initiating treatment with an antidepressant, patients with depressive symptoms should be adequately screened to determine if they are at risk for bipolar disorder; such screening should include a detailed psychiatric history, including a family history of suicide, bipolar disorder, and depression.

It should be noted that sertraline hydrochloride is not approved for use in treating bipolar depression.

Cases of serious sometimes fatal reactions have been reported in patients receiving sertraline hydrochloride, a selective serotonin reuptake inhibitor (SSRI), in combination with a monoamine oxidase inhibitor (MAOI).

Symptoms of a drug interaction between an SSRI and an MAOI include: hyperthermia, rigidity, myoclonus, autonomic instability with possible rapid fluctuations of vital signs, mental status changes that include confusion, irritability, and extreme agitation progressing to delirium and coma.

These reactions have also been reported in patients who have recently discontinued an SSRI and have been started on an MAOI.

Some cases presented with features resembling neuroleptic malignant syndrome.

Therefore, sertraline hydrochloride should not be used in combination with an MAOI, or within 14 days of discontinuing treatment with an MAOI.

Similarly, at least 14 days should be allowed after stopping sertraline hydrochloride before starting an MAOI.

The concomitant use of sertraline hydrochloride with MAOIs intended to treat depression is contraindicated (see CONTRAINDICATIONS and – Potential for Interaction with Monoamine Oxidase Inhibitors ).

Serotonin Syndrome or Neuroleptic Malignant Syndrome (NMS)-like Reactions: The development of a potentially life-threatening serotonin syndrome or Neuroleptic Malignant Syndrome (NMS)-like reactions have been reported with SNRIs and SSRIs alone, including sertraline hydrochloride treatment, but particularly with concomitant use of serotonergic drugs (including triptans and fentanyl) and with drugs which impair metabolism of serotonin (including MAOIs), or with antipsychotics or other dopamine antagonists.

Serotonin syndrome symptoms may include mental status changes (e.g., agitation, hallucinations, coma), autonomic instability (e.g., tachycardia, labile blood pressure, hyperthermia), neuromuscular aberrations (e.g., hyperreflexia, incoordination) and/or gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea).

Serotonin syndrome, in its most severe form can resemble neuroleptic malignant syndrome, which includes hyperthermia, muscle rigidity, autonomic instability with possible rapid fluctuation of vital signs, and mental status changes.

Patients should be monitored for the emergence of serotonin syndrome or NMS-like signs and symptoms.

The concomitant use of sertraline hydrochloride with MAOIs intended to treat depression is contraindicated.

If concomitant treatment of sertraline hydrochloride, with a 5-hydroxytryptamine receptor agonist (triptan) is clinically warranted, careful observation of the patient is advised, particularly during treatment initiation and dose increases.

The concomitant use of SNRIs and SSRIs, including serteraline hydrochloride, with serotonin precursors (such as tryptophan) is not recommended.

Treatment with sertraline hydrochloride and any concomitant serotonergic or antidopaminergic agents, including antipsychotics, should be discontinued immediately if the above events occur and supportive symptomatic treatment should be initiated.

Co-administration of sertraline hydrochloride with other drugs which enhance the effects of serotonergic neurotransmission, such as tryptophan, fenfluramine, fentanyl, 5-HT agonists, or the herbal medicine St.

John’s Wort (hypericum perforatum) should be undertaken with caution and avoided whenever possible due to the potential for pharmacodynamic interaction.

DRUG INTERACTIONS

Drug Interactions Potential Effects of Coadministration of Drugs Highly Bound to Plasma Proteins Because sertraline is tightly bound to plasma protein, the administration of sertraline hydrochloride to a patient taking another drug which is tightly bound to protein (e.g., warfarin, digitoxin) may cause a shift in plasma concentrations potentially resulting in an adverse effect.

Conversely, adverse effects may result from displacement of protein bound sertraline hydrochloride by other tightly bound drugs.

In a study comparing prothrombin time AUC (0-120 hr) following dosing with warfarin (0.75 mg/kg) before and after 21 days of dosing with either sertraline hydrochloride (50 to 200 mg/day) or placebo, there was a mean increase in prothrombin time of 8% relative to baseline for sertraline hydrochloride compared to a 1% decrease for placebo (p<0.02).

The normalization of prothrombin time for the sertraline hydrochloride group was delayed compared to the placebo group.

The clinical significance of this change is unknown.

Accordingly, prothrombin time should be carefully monitored when sertraline therapy is initiated or stopped.

Cimetidine In a study assessing disposition of sertraline hydrochloride (100 mg) on the second of 8 days of cimetidine administration (800 mg daily), there were significant increases in sertraline hydrochloride mean AUC (50%), C max (24%) and half-life (26%) compared to the placebo group.

The clinical significance of these changes is unknown.

CNS Active Drugs In a study comparing the disposition of intravenously administered diazepam before and after 21 days of dosing with either sertraline hydrochloride (50 to 200 mg/day escalating dose) or placebo, there was a 32% decrease relative to baseline in diazepam clearance for the sertraline hydrochloride group compared to a 19% decrease relative to baseline for the placebo group (p<0.03).

There was a 23% increase in T max for desmethyldiazepam in the sertraline hydrochloride group compared to a 20% decrease in the placebo group (p<0.03).

The clinical significance of these changes is unknown.

In a placebo-controlled trial in normal volunteers, the administration of two doses of sertraline hydrochloride did not significantly alter steady-state lithium levels or the renal clearance of lithium.

Nonetheless, at this time, it is recommended that plasma lithium levels be monitored following initiation of sertraline hydrochloride therapy with appropriate adjustments to the lithium dose.

In a controlled study of a single dose (2 mg) of pimozide, 200 mg sertraline (q.d.) co-administration to steady state was associated with a mean increase in pimozide AUC and C max of about 40%, but was not associated with any changes in EKG.

Since the highest recommended pimozide dose (10 mg) has not been evaluated in combination with sertraline, the effect on QT interval and PK parameters at doses higher than 2 mg at this time are not known.

While the mechanism of this interaction is unknown, due to the narrow therapeutic index of pimozide and due to the interaction noted at a low dose of pimozide, concomitant administration of sertraline hydrochloride and pimozide should be contraindicated (see CONTRAINDICATIONS ).

Results of a placebo-controlled trial in normal volunteers suggest that chronic administration of sertraline 200 mg/day does not produce clinically important inhibition of phenytoin metabolism.

Nonethless, at this time, it is recommended that plasma phenytoin concentrations be monitored following initiation of Sertraline Hydrochloride therapy with appropriate adjustments to the phenytoin dose, practiculary in patients with multiple underlying medical conditions and/or those receiving multiple concomitant medications.

The effect of Sertraline Hydrochloride on valproate levels has not been evaluated in clinical trials.

In the absence of such data, it is recommended that plasma valproate levels be monitored following initiation of sertraline hydrochloride therapy with appropriate adjustments to the valproate dose.

The risk of using sertraline hydrochloride in combination with other CNS active drugs has not been systematically evaluated.

Consequently, caution is advised if the concomitant administration of sertraline hydrochloride and such drugs is required.

There is limited controlled experience regarding the optimal timing of switching from other drugs effective in the treatment of major depressive disorder to sertraline hydrochloride.

Care and prudent medical judgment should be exercised when switching, particularly from long-acting agents.

The duration of an appropriate washout period which should intervene before switching from one selective serotonin reuptake inhibitor (SSRI) to another has not been established.

Monoamine Oxidase Inhibitors See CONTRAINDICATIONS and WARNINGS .

Drugs Metabolized by P450 3A4 In three separate in vivo interaction studies, sertraline was co-administered with cytochrome P450 3A4 substrates, terfenadine, carbamazepine, or cisapride under steady-state conditions.

The results of these studies indicated that sertraline did not increase plasma concentrations of terfenadine, carbamazepine, or cisapride.

These data indicate that sertraline’s extent of inhibition of P450 3A4 activity is not likely to be of clinical significance.

Results of the interaction study with cisapride indicate that sertraline 200 mg (q.d.) induces the metabolism of cisapride (cisapride AUC and C max were reduced by about 35%).

Drugs Metabolized by P450 2D6 Many drugs effective in the treatment of major depressive disorder, e.g., the SSRIs, including sertraline, and most tricyclic antidepressant drugs effective in the treatment of major depressive disorder inhibit the biochemical activity of the drug metabolizing isozyme cytochrome P450 2D6 (debrisoquin hydroxylase), and, thus, may increase the plasma concentrations of co-administered drugs that are metabolized by P450 2D6.

The drugs for which this potential interaction is of greatest concern are those metabolized primarily by 2D6 and which have a narrow therapeutic index, e.g., the tricyclic antidepressant drugs effective in the treatment of major depressive disorder and the Type 1C antiarrhythmics propafenone and flecainide.

The extent to which this interaction is an important clinical problem depends on the extent of the inhibition of P450 2D6 by the antidepressant and the therapeutic index of the co-administered drug.

There is variability among the drugs effective in the treatment of major depressive disorder in the extent of clinically important 2D6 inhibition, and in fact sertraline at lower doses has a less prominent inhibitory effect on 2D6 than some others in the class.

Nevertheless, even sertraline has the potential for clinically important 2D6 inhibition.

Consequently, concomitant use of a drug metabolized by P450 2D6 with sertraline hydrochloride may require lower doses than usually prescribed for the other drug.

Furthermore, whenever sertraline hydrochloride is withdrawn from co-therapy, an increased dose of the co-administered drug may be required (see Tricyclic Antidepressant Drugs Effective in the Treatment of Major Depressive Disorder under PRECAUTIONS ).

Serotonergic Drugs Based on the mechanism of action of SNRIs and SSRIs, including sertraline hydrochloride, and the potential for serotonin syndrome, caution is advised when SNRIs and SSRIs, including sertraline hydrochloride, are coadministered with other drugs that may affect the serotonergic neutrotransmitter systems, such as triptans, linezolid (an antibiotic which is a reversible non-selective MAOI), lithium, tramadol, or St.

John’s Wort (see WARNINGS-Serotonin Syndrome ).

The concomitant use of sertraline hydrochloride with other SSRIs, SNRIs or tryptophan is not recommended (see PRECAUTIONS – Drug Interactions ).

Triptans There have been rare post-marketing reports of serotonin syndrome with use of an SNRI or an SSRI and a triptan.

If concomitant treatment of SNRIs and SSRIs, including sertraline hydrochloride, with a triptan is clinically warranted, careful observation of the patient is advised, particularly during treatment initiation and dose increases (see WARNINGS – Serotonin Syndrome ).

Sumatriptan There have been rare post marketing reports describing patients with weakness, hyperreflexia, and incoordination following the use of a selective serotonin reuptake inhibitor (SSRI) and sumatriptan.

If concomitant treatment with sumatriptan and an SSRI (e.g., citalopram, fluoxetine, fluvoxamine, paroxetine, sertraline) is clinically warranted, appropriate observation of the patient is advised.

Tricyclic Antidepressant Drugs Effective in the Treatment of Major Depressive Disorder (TCAs) The extent to which SSRI–TCA interactions may pose clinical problems will depend on the degree of inhibition and the pharmacokinetics of the SSRI involved.

Nevertheless, caution is indicated in the co-administration of TCAs with sertraline hydrochloride, because sertraline may inhibit TCA metabolism.

Plasma TCA concentrations may need to be monitored, and the dose of TCA may need to be reduced, if a TCA is co-administered with sertraline (see Drugs Metabolized by P450 2D6 under PRECAUTIONS ).

Hypoglycemic Drugs In a placebo-controlled trial in normal volunteers; administration of sertraline hydrochloride for 22 days (including 200 mg/day for the final 13 days) caused a statistically significant 16% decrease from baseline in the clearance of tolbutamide following an intravenous 1000 mg dose.

Sertraline hydrochloride administration did not noticeably change either the plasma protein binding or the apparent volume of distribution of tolbutamide, suggesting that the decreased clearance was due to a change in the metabolism of the drug.

The clinical significance of this decrease in tolbutamide clearance is unknown.

Atenolol Sertraline hydrochloride (100 mg) when administered to 10 healthy male subjects had no effect on the beta-adrenergic blocking ability of atenolol.

Digoxin In a placebo-controlled trial in normal volunteers, administration of sertraline hydrochloride for 17 days (including 200 mg/day for the last 10 days) did not change serum digoxin levels or digoxin renal clearance.

Microsomal Enzyme Induction Preclinical studies have shown sertraline hydrochloride to induce hepatic microsomal enzymes.

In clinical studies, sertraline hydrochloride was shown to induce hepatic enzymes minimally as determined by a small (5%) but statistically significant decrease in antipyrine half-life following administration of 200 mg/day for 21 days.

This small change in antipyrine half-life reflects a clinically insignificant change in hepatic metabolism.

Drugs That Interfere With Hemostasis (Non-selective NSAIDs, Aspirin, Warfarin, etc.) Serotonin release by platelets plays an important role in hemostasis.

Epidemiological studies of the case-control and cohort design that have demonstrated an association between the use of psychotropic drugs that interfere with serotonin reuptake and the occurrence of upper gastrointestinal bleeding have also shown that concurrent use of an NSAID, or aspirin potentiated the risk of bleeding.

These studies have also shown that concurrent use of an NSAID or aspirin may potentiate this risk of bleeding.

Altered anticoagulant effects, including increased bleeding, have been reported when SSRIs or SNRIs are coadministered with warfarin.

Patients receiving warfarin therapy should be carefully monitored when sertraline hydrochloride is initiated or discontinued.

Electroconvulsive Therapy There are no clinical studies establishing the risks or benefits of the combined use of electroconvulsive therapy (ECT) and sertraline hydrochloride.

Alcohol Although sertraline hydrochloride did not potentiate the cognitive and psychomotor effects of alcohol in experiments with normal subjects, the concomitant use of sertraline hydrochloride and alcohol is not recommended.

OVERDOSAGE

Human Experience Of 1,027 cases of overdose involving sertraline hydrochloride worldwide, alone or with other drugs, there were 72 deaths (circa 1999).

Among 634 overdoses in which sertraline hydrochloride was the only drug ingested, 8 resulted in fatal outcome, 75 completely recovered, and 27 patients experienced sequelae after overdosage to include alopecia, decreased libido, diarrhea, ejaculation disorder, fatigue, insomnia, somnolence and serotonin syndrome.

The remaining 524 cases had an unknown outcome.

The most common signs and symptoms associated with non-fatal sertraline hydrochloride overdosage were somnolence, vomiting, tachycardia, nausea, dizziness, agitation and tremor.

The largest known ingestion was 13.5 grams in a patient who took sertraline hydrochloride alone and subsequently recovered.

However, another patient who took 2.5 grams of sertraline hydrochloride alone experienced a fatal outcome.

Other important adverse events reported with sertraline hydrochloride overdose (single or multiple drugs) include bradycardia, bundle branch block, coma, convulsions, delirium, hallucinations, hypertension, hypotension, manic reaction, pancreatitis, QT-interval prolongation, serotonin syndrome, stupor and syncope.

Overdose Management Treatment should consist of those general measures employed in the management of overdosage with any antidepressant.

Ensure an adequate airway, oxygenation and ventilation.

Monitor cardiac rhythm and vital signs.

General supportive and symptomatic measures are also recommended.

Induction of emesis is not recommended.

Gastric lavage with a large-bore orogastric tube with appropriate airway protection, if needed, may be indicated if performed soon after ingestion, or in symptomatic patients.

Activated charcoal should be administered.

Due to large volume of distribution of this drug, forced diuresis, dialysis, hemoperfusion and exchange transfusion are unlikely to be of benefit.

No specific antidotes for sertraline are known.

In managing overdosage, consider the possibility of multiple drug involvement.

The physician should consider contacting a poison control center on the treatment of any overdose.

Telephone numbers for certified poison control centers are listed in the Physicians’ Desk Reference (PDR).

DESCRIPTION

Sertraline hydrochloride is a selective serotonin reuptake inhibitor (SSRI) for oral administration.

It has a molecular weight of 342.7.

Sertraline hydrochloride has the following chemical name: (1S-cis)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-1-naphthalenamine hydrochloride.

The empirical formula C 17 H 17 NC l2 ∙HCl is represented by the following structural formula: Sertraline hydrochloride is a white crystalline powder that is slightly soluble in water and isopropyl alcohol, and sparingly soluble in ethanol.

Sertraline is supplied for oral administration as scored tablets containing sertraline hydrochloride equivalent to 25, 50 and 100 mg of sertraline and the following inactive ingredients: D & C Yellow #10 aluminum lake (in 25 mg tablet), FD & C Blue #2 aluminum lake (in 25 mg & 50 mg tablets), magnesium stearate, microcrystalline cellulose, polyethylene glycolS, polyvinyl alcohol, povidone K30, sodium starch glycolate, talc, titanium dioxide & yellow iron oxide.

Chemical Structure

CLINICAL STUDIES

Clinical Trials Major Depressive Disorder The efficacy of sertraline as a treatment for major depressive disorder was established in two placebo-controlled studies in adult outpatients meeting DSM-III criteria for major depressive disorder.

Study 1 was an 8-week study with flexible dosing of sertraline in a range of 50 to 200 mg/day; the mean dose for completers was 145 mg/day.

Study 2 was a 6-week fixed-dose study, including sertraline doses of 50, 100, and 200 mg/day.

Overall, these studies demonstrated sertraline hydrochloride to be superior to placebo on the Hamilton Depression Rating Scale and the Clinical Global Impression Severity and Improvement scales.

Study 2 was not readily interpretable regarding a dose response relationship for effectiveness.

Study 3 involved depressed outpatients who had responded by the end of an initial 8-week open treatment phase on sertraline 50-200 mg/day.

These patients (N=295) were randomized to continuation for 44 weeks on double-blind sertraline hydrochloride 50-200 mg/day or placebo.

A statistically significantly lower relapse rate was observed for patients taking sertraline hydrochloride compared to those on placebo.

The mean dose for completers was 70 mg/day.

Analyses for gender effects on outcome did not suggest any differential responsiveness on the basis of sex.

Premenstrual Dysphoric Disorder (PMDD) The effectiveness of sertraline for the treatment of PMDD was established in two double-blind, parallel group, placebo-controlled flexible dose trials (Studies 1 and 2) conducted over 3 menstrual cycles.

Patients in Study 1 met DSM-III-R criteria for Late Luteal Phase Dysphoric Disorder (LLPDD), the clinical entity now referred to as Premenstrual Dysphoric Disorder (PMDD) in DSM-IV.

Patients in Study 2 met DSM-IV criteria for PMDD.

Study 1 utilized daily dosing throughout the study, while Study 2 utilized luteal phase dosing for the 2 weeks prior to the onset of menses.

The mean duration of PMDD symptoms for these patients was approximately 10.5 years in both studies.

Patients on oral contraceptives were excluded from these trials; therefore, the efficacy of sertraline in combination with oral contraceptives for the treatment of PMDD is unknown.

Efficacy was assessed with the Daily Record of Severity of Problems (DRSP), a patient-rated instrument that mirrors the diagnostic criteria for PMDD as identified in the DSM-IV, and includes assessments for mood, physical symptoms, and other symptoms.

Other efficacy assessments included the Hamilton Depression Rating Scale (HAMD-17), and the Clinical Global Impression Severity of Illness (CGI-S) and Improvement (CGI-I) scores.

In Study 1, involving n=251 randomized patients, sertraline hydrochloride treatment was initiated at 50 mg/day and administered daily throughout the menstrual cycle.

In subsequent cycles, patients were dosed in the range of 50-150 mg/day on the basis of clinical response and toleration.

The mean dose for completers was 102 mg/day.

Sertraline hydrochloride administered daily throughout the menstrual cycle was significantly more effective than placebo on change from baseline to endpoint on the DRSP total score, the HAMD-17 total score, and the CGI-S score, as well as the CGI-I score at endpoint.

In Study 2, involving n=281 randomized patients, sertraline hydrochloride treatment was initiated at 50 mg/day in the late luteal phase (last 2 weeks) of each menstrual cycle and then discontinued at the onset of menses.

In subsequent cycles, patients were dosed in the range of 50-100 mg/day in the luteal phase of each cycle, on the basis of clinical response and toleration.

Patients who were titrated to 100 mg/day received 50 mg/day for the first 3 days of the cycle, then 100 mg/day for the remainder of the cycle.

The mean sertraline hydrochloride dose for completers was 74 mg/day.

Sertraline hydrochloride administered in the late luteal phase of the menstrual cycle was significantly more effective than placebo on change from baseline to endpoint on the DRSP total score and the CGI-S score, as well as the CGI-I score at endpoint.

There was insufficient information to determine the effect of race or age on outcome in these studies.

HOW SUPPLIED

Sertraline hydrochloride modified oval biconvex tablets, containing sertraline hydrochloride equivalent to 25, 50 and 100 mg of sertraline, are packaged in bottles.

Sertraline hydrochloride 25 mg Tablets: Light Green film coated, Modified oval biconvex tablets debossed with 5 on the left side of bisect and 8 on the right side of bisect on one side and “W” on other.

NDC 51138-585-30 Bottles of 30 Sertraline hydrochloride 50 mg Tablets: Light Blue film coated, Modified oval biconvex tablets debossed with 5 on the left side of bisect and 7 on the right side of bisect on one side and “W” on other.

NDC 51138-586-30 Bottles of 30 Sertraline hydrochloride 100 mg Tablets: Light Yellow film coated, Modified oval biconvex tablets debossed with 5 on the left side of bisect and 6 on the right side of bisect on one side and “W” on other.

NDC 51138-587-30 Bottles of 30 New Tablet ID Store at 20ºC to 25ºC (68ºF to 77ºF) [See USP Controlled Room Temperature].

Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure.

GERIATRIC USE

Geriatric Use U.S.

geriatric clinical studies of sertraline hydrochloride in major depressive disorder included 663 sertraline hydrochloride-treated subjects ≥ 65 years of age, of those, 180 were ≥ 75 years of age.

No overall differences in the pattern of adverse reactions were observed in the geriatric clinical trial subjects relative to those reported in younger subjects (see ADVERSE REACTIONS ), and other reported experience has not identified differences in safety patterns between the elderly and younger subjects.

As with all medications, greater sensitivity of some older individuals cannot be ruled out.

There were 947 subjects in placebo-controlled geriatric clinical studies of sertraline hydrochloride in major depressive disorder.

No overall differences in the pattern of efficacy were observed in the geriatric clinical trial subjects relative to those reported in younger subjects.

Other Adverse Events in Geriatric Patients In 354 geriatric subjects treated with sertraline hydrochloride in placebo-controlled trials, the overall profile of adverse events was generally similar to that shown in Table 2.

Urinary tract infection was the only adverse event not appearing in Table 2.

SSRIs and SNRIs, including sertraline hydrochloride, have been associated with cases of clinically significant hyponatremia in elderly patients, who may be at greater risk for this adverse event (see PRECAUTIONS, Hyponatremia ).

Diabetes/Loss of Glycemic Control Cases of new onset diabetes mellitus have been reported in patients receiving SSRIs including sertraline hydrochloride.

Loss of glycemic control including both hyperglycemia and hypoglycemia has also been reported in patients with and without preexisting diabetes.

Patients should therefore be monitored for signs and symptoms of glucose fluctuations.

Diabetic patients especially should have their glycemic control carefully monitored since their dosage of insulin and/or concomitant oral hypoglycemic drug may need to be adjusted.

INDICATIONS AND USAGE

Major Depressive Disorder Sertraline is indicated for the treatment of major depressive disorder in adults.

The efficacy of sertraline hydrochloride in the treatment of a major depressive episode was established in six to eight week controlled trials of adult outpatients whose diagnoses corresponded most closely to the DSM-III category of major depressive disorder (see Clinical Trials under CLINICAL PHARMACOLOGY ).

A major depressive episode implies a prominent and relatively persistent depressed or dysphoric mood that usually interferes with daily functioning (nearly every day for at least 2 weeks); it should include at least 4 of the following 8 symptoms: change in appetite, change in sleep, psychomotor agitation or retardation, loss of interest in usual activities or decrease in sexual drive, increased fatigue, feelings of guilt or worthlessness, slowed thinking or impaired concentration, and a suicide attempt or suicidal ideation.

The antidepressant action of sertraline hydrochloride in hospitalized depressed patients has not been adequately studied.

The efficacy of sertraline hydrochloride in maintaining an antidepressant response for up to 44 weeks following 8 weeks of open-label acute treatment (52 weeks total) was demonstrated in a placebo-controlled trial.

The usefulness of the drug in patients receiving sertraline hydrochloride for extended periods should be reevaluated periodically (see Clinical Trials under CLINICAL PHARMACOLOGY ).

Premenstrual Dysphoric Disorder (PMDD) Sertraline hydrochloride is indicated for the treatment of premenstrual dysphoric disorder (PMDD) in adults.

The efficacy of sertraline hydrochloride in the treatment of PMDD was established in 2 placebo-controlled trials of female adult outpatients treated for 3 menstrual cycles who met criteria for the DSM-III­-R/IV category of PMDD (see Clinical Trials under CLINICAL PHARMACOLOGY ).

The essential features of PMDD include markedly depressed mood, anxiety or tension, affective lability, and persistent anger or irritability.

Other features include decreased interest in activities, difficulty concentrating, lack of energy, change in appetite or sleep, and feeling out of control.

Physical symptoms associated with PMDD include breast tenderness, headache, joint and muscle pain, bloating and weight gain.

These symptoms occur regularly during the luteal phase and remit within a few days following onset of menses; the disturbance markedly interferes with work or school or with usual social activities and relationships with others.

In making the diagnosis, care should be taken to rule out other cyclical mood disorders that may be exacerbated by treatment with an antidepressant.

The effectiveness of sertraline hydrochloride in long-term use, that is, for more than 3 menstrual cycles, has not been systematically evaluated in controlled trials.

Therefore, the physician who elects to use sertraline hydrochloride for extended periods should periodically re-evaluate the long-term usefulness of the drug for the individual patient (see DOSAGE AND ADMINISTRATION ).

PEDIATRIC USE

Pediatric Use Safety and effectiveness in pediatric patients with major depressive disorder have not been established (see BOX WARNING and WARNINGS , Clinical Worsening and Suicide Risk ).

Two placebo controlled trials (n=373) in pediatric patients with MDD have been conducted with sertraline hydrochloride, and the data were not sufficient to support a claim for use in pediatric patients.

Anyone considering the use of sertraline hydrochloride tablets in a child or adolescent must balance the potential risks with the clinical need.

Sertraline pharmacokinetics were evaluated in a group of 61 pediatric patients between 6 and 17 years of age and revealed similar drug exposures to those of adults when plasma concentration was adjusted for weight (see Pharmacokinetics under CLINICAL PHARMACOLOGY ).

Approximately 600 pediatric patients between 6 and 17 years of age have received sertraline in clinical trials, both controlled and uncontrolled.

The adverse event profile observed in these patients was generally similar to that observed in adult studies with sertraline hydrochloride (see ADVERSE REACTIONS ).

As with other SSRIs, decreased appetite and weight loss have been observed in association with the use of sertraline hydrochloride.

In a pooled analysis of two 10­-week, double-blind, placebo-controlled, flexible dose (50-200 mg) outpatient trials for major depressive disorder (n=373), there was a difference in weight change between sertraline and placebo of roughly 1 kilogram, for both children (ages 6-11) and adolescents (ages 12-17), in both cases representing a slight weight loss for sertraline compared to a slight gain for placebo.

At baseline the mean weight for children was 39.0 kg for sertraline and 38.5 kg for placebo.

At baseline the mean weight for adolescents was 61.4 kg for sertraline and 62.5 kg for placebo.

There was a bigger difference between sertraline and placebo in the proportion of outliers for clinically important weight loss in children than in adolescents.

For children, about 7% had a weight loss > 7% of body weight compared to none of the placebo patients; for adolescents, about 2% had a weight loss > 7% of body weight compared to about 1% of the placebo patients.

A subset of these patients who completed the randomized controlled trials (sertraline n=99, placebo n=122) were continued into a 24-week, flexible-dose, open-label, extension study.

A mean weight loss of approximately 0.5 kg was seen during the first eight weeks of treatment for subjects with first exposure to sertraline during the open-label extension study, similar to the mean weight loss observed among sertraline treated subjects during the first eight weeks of the randomized controlled trials.

The subjects continuing in the open label study began gaining weight compared to baseline by week 12 of sertraline treatment.

Those subjects who completed 34 weeks of sertraline treatment (10 weeks in a placebo controlled trial + 24 weeks open label, n=68), had weight gain that was similar to that expected using data from age-adjusted peers.

Regular monitoring of weight and growth is recommended if treatment of a pediatric patient with an SSRI is to be continued long term.

Safety and effectiveness in pediatric patients with major depressive disorder have not been established.

The risks, if any, that may be associated with sertraline hydrochloride’s use beyond 1 year in children and adolescents have not been systematically assessed.

The prescriber should be mindful that the evidence relied upon to conclude that sertraline is safe for use in children and adolescents derives from clinical studies that were 10 to 52 weeks in duration and from the extrapolation of experience gained with adult patients.

In particular, there are no studies that directly evaluate the effects of long-term sertraline use on the growth, development, and maturation of children and adolescents.

Although there is no affirmative finding to suggest that sertraline possesses a capacity to adversely affect growth, development or maturation, the absence of such findings is not compelling evidence of the absence of the potential of sertraline to have adverse effects in chronic use (see WARNINGS – Clinical Worsening and Suicide Risk ).

PREGNANCY

Pregnancy–Pregnancy Category C Reproduction studies have been performed in rats and rabbits at doses up to 80 mg/kg/day and 40 mg/kg/day, respectively.

These doses correspond to approximately 4 times the maximum recommended human dose (MRHD) on a mg/m 2 basis.

There was no evidence of teratogenicity at any dose level.

When pregnant rats and rabbits were given sertraline during the period of organogenesis, delayed ossification was observed in fetuses at doses of 10 mg/kg (0.5 times the MRHD on a mg/m 2 basis) in rats and 40 mg/kg (4 times the MRHD on a mg/m 2 basis) in rabbits.

When female rats received sertraline during the last third of gestation and throughout lactation, there was an increase in the number of stillborn pups and in the number of pups dying during the first 4 days after birth.

Pup body weights were also decreased during the first four days after birth.

These effects occurred at a dose of 20 mg/kg (1 times the MRHD on a mg/m 2 basis).

The no effect dose for rat pup mortality was 10 mg/kg (0.5 times the MRHD on a mg/m 2 basis).

The decrease in pup survival was shown to be due to in utero exposure to sertraline.

The clinical significance of these effects is unknown.

There are no adequate and well-controlled studies in pregnant women.

Sertraline hydrochloride should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

NUSRING MOTHERS

Nursing Mothers It is not known whether, and if so in what amount, sertraline or its metabolites are excreted in human milk.

Because many drugs are excreted in human milk, caution should be exercised when sertraline hydrochloride is administered to a nursing woman.

BOXED WARNING

Suicidality and Antidepressant Drugs Antidepressants increased the risk compared to placebo of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of major depressive disorder (MDD) and other psychiatric disorders.

Anyone considering the use of sertraline hydrochloride or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need.

Short-term studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24; there was a reduction in risk with antidepressants compared to placebo in adults aged 65 and older.

Depression and certain other psychiatric disorders are themselves associated with increases in the risk of suicide.

Patients of all ages who are started on antidepressant therapy should be monitored appropriately and observed closely for clinical worsening, suicidality, or unusual changes in behavior.

Families and caregivers should be advised of the need for close observation and communication with the prescriber.

Sertraline hydrochloride is not approved for use in pediatric patients except for patients with obsessive compulsive disorder (OCD).

(See Warnings: Clinical Worsening and Suicide Risk , Precautions: Information for Patients , and Precautions: Pediatric Use )

INFORMATION FOR PATIENTS

Information for Patients Prescribers or other health professionals should inform patients, their families, and their caregivers about the benefits and risks associated with treatment with sertraline hydrochloride and should counsel them in its appropriate use.

A patient Medication Guide about ‘Antidepressant Medicines, Depression and other Serious Mental Illness, and Suicidal Thoughts or Actions’ is available for sertraline hydrochloride.

The prescriber or health professional should instruct patients, their families, and their caregivers to read the Medication Guide and should assist them in understanding its contents.

Patients should be given the opportunity to discuss the contents of the Medication Guide and to obtain answers to any questions they may have.

The complete text of the Medication Guide is reprinted at the end of this document.

Patients should be advised of the following issues and asked to alert their prescriber if these occur while taking sertraline hydrochloride.

Clinical Worsening and Suicide Risk Patients, their families, and their caregivers should be encouraged to be alert to the emergence of anxiety, agitation, panic attacks, insomnia, irritability, hostility, aggressiveness, impulsivity, akathisia (psychomotor restlessness), hypomania, mania, other unusual changes in behavior, worsening of depression, and suicidal ideation, especially early during antidepressant treatment and when the dose is adjusted up or down.

Families and caregivers of patients should be advised to look for the emergence of such symptoms on a day-to-day basis, since changes may be abrupt.

Such symptoms should be reported to the patient’s prescriber or health professional, especially if they are severe, abrupt in onset, or were not part of the patient’s presenting symptoms.

Symptoms such as these may be associated with an increased risk for suicidal thinking and behavior and indicate a need for very close monitoring and possibly changes in the medication.

Patients should be cautioned about the risk of serotonin syndrome with the concomitant use of SNRIs and SSRIs, including sertraline hydrochloride, and triptans, tramadol, or other serotonergic agents.

Patients should be told that although sertraline hydrochloride has not been shown to impair the ability of normal subjects to perform tasks requiring complex motor and mental skills in laboratory experiments, drugs that act upon the central nervous system may affect some individuals adversely.

Therefore, patients should be told that until they learn how they respond to sertraline hydrochloride they should be careful doing activities when they need to be alert, such as driving a car or operating machinery.

Patients should be cautioned about the concomitant use of sertraline hydrochloride and non-selective NSAIDs (i.e., NSAIDs that inhibit both cycloxygenase isoenzymes COX1 and 2), aspirin, or other drugs that affect coagulation since the combined use of psychotropic drugs that interfere with serotonin reuptake and these agents has been associated with an increased risk of bleeding.

Patients should be told that although sertraline hydrochloride has not been shown in experiments with normal subjects to increase the mental and motor skill impairments caused by alcohol, the concomitant use of sertraline hydrochloride and alcohol is not advised.

Patients should be told that while no adverse interaction of sertraline hydrochloride with over-the-counter (OTC) drug products is known to occur, the potential for interaction exists.

Thus, the use of any OTC product should be initiated cautiously according to the directions of use given for the OTC product.

Patients should be advised to notify their physician if they become pregnant or intend to become pregnant during therapy.

Patients should be advised to notify their physician if they are breast feeding an infant.

DOSAGE AND ADMINISTRATION

Initial Treatment Dosage for Adults Major Depressive Disorder Sertraline hydrochloride treatment should be administered at a dose of 50 mg once daily.

While a relationship between dose and effect has not been established for major depressive disorder, patients were dosed in a range of 50-200 mg/day in the clinical trials demonstrating the effectiveness of sertraline hydrochloride for the treatment of this indication.

Consequently, a dose of 50 mg, administered once daily, is recommended as the initial therapeutic dose.

Patients not responding to a 50 mg dose may benefit from dose increases up to a maximum of 200 mg/day.

Given the 24 hour elimination half-life of sertraline hydrochloride, dose changes should not occur at intervals of less than 1 week.

Premenstrual Dysphoric Disorder Sertraline hydrochloride treatment should be initiated with a dose of 50 mg/day, either daily throughout the menstrual cycle or limited to the luteal phase of the menstrual cycle, depending on physician assessment.

While a relationship between dose and effect has not been established for PMDD, patients were dosed in the range of 50-150 mg/day with dose increases at the onset of each new menstrual cycle (see Clinical Trials under CLINICAL PHARMACOLOGY ).

Patients not responding to a 50 mg/day dose may benefit from dose increases (at 50 mg increments/menstrual cycle) up to 150 mg/day when dosing daily throughout the menstrual cycle, or 100 mg/day when dosing during the luteal phase of the menstrual cycle.

If a 100 mg/day dose has been established with luteal phase dosing, a 50 mg/day titration step for three days should be utilized at the beginning of each luteal phase dosing period.

Sertraline hydrochloride should be administered once daily, either in the morning or evening.

Maintenance/Continuation/Extended Treatment Major Depressive Disorder It is generally agreed that acute episodes of major depressive disorder require several months or longer of sustained pharmacologic therapy beyond response to the acute episode.

Systematic evaluation of sertraline hydrochloride has demonstrated that its antidepressant efficacy is maintained for periods of up to 44 weeks following 8 weeks of initial treatment at a dose of 50-200 mg/day (mean dose of 70 mg/day) (see Clinical Trials under CLINICAL PHARMACOLOGY ).

It is not known whether the dose of sertraline hydrochloride needed for maintenance treatment is identical to the dose needed to achieve an initial response.

Patients should be periodically reassessed to determine the need for maintenance treatment.

Premenstrual Dysphoric Disorder The effectiveness of sertraline hydrochloride in long-term use, that is, for more than 3 menstrual cycles, has not been systematically evaluated in controlled trials.

However, as women commonly report that symptoms worsen with age until relieved by the onset of menopause, it is reasonable to consider continuation of a responding patient.

Dosage adjustments, which may include changes between dosage regimens (e.g., daily throughout the menstrual cycle versus during the luteal phase of the menstrual cycle), may be needed to maintain the patient on the lowest effective dosage and patients should be periodically reassessed to determine the need for continued treatment.

Switching Patients to or from a Monoamine Oxidase Inhibitor At least 14 days should elapse between discontinuation of an MAOI and initiation of therapy with sertraline hydrochloride.

In addition, at least 14 days should be allowed after stopping sertraline hydrochloride before starting an MAOI (see CONTRAINDICATIONS and WARNINGS ).

Special Populations Dosage for Hepatically Impaired Patients The use of sertraline in patients with liver disease should be approached with caution.

The effects of sertraline in patients with moderate and severe hepatic impairment have not been studied.

If sertraline is administered to patients with liver impairment, a lower or less frequent dose should be used (see CLINICAL PHARMACOLOGY and PRECAUTIONS ).

Treatment of Pregnant Women During the Third Trimester Neonates exposed to sertraline hydrochloride and other SSRIs or SNRIs, late in the third trimester have developed complications requiring prolonged hospitalization, respiratory support, and tube feeding (see PRECAUTIONS ).

When treating pregnant women with sertraline hydrochloride during the third trimester, the physician should carefully consider the potential risks and benefits of treatment.

The physician may consider tapering sertraline hydrochloride in the third trimester.

Discontinuation of Treatment with Sertraline Symptoms associated with discontinuation of sertraline hydrochloride and other SSRIs and SNRIs, have been reported (see PRECAUTIONS ).

Patients should be monitored for these symptoms when discontinuing treatment.

A gradual reduction in the dose rather than abrupt cessation is recommended whenever possible.

If intolerable symptoms occur following a decrease in the dose or upon discontinuation of treatment, then resuming the previously prescribed dose may be considered.

Subsequently, the physician may continue decreasing the dose but at a more gradual rate.

Azithromycin 500 MG Oral Tablet [Zithromax]

DRUG INTERACTIONS

7 Nelfinavir: Close monitoring for known adverse reactions of azithromycin, such as liver enzyme abnormalities and hearing impairment, is warranted.

( 7.1 ) Warfarin: Use with azithromycin may increase coagulation times; monitor prothrombin time.

( 7.2 ) 7.1 Nelfinavir Co-administration of nelfinavir at steady-state with a single oral dose of azithromycin resulted in increased azithromycin serum concentrations.

Although a dose adjustment of azithromycin is not recommended when administered in combination with nelfinavir, close monitoring for known adverse reactions of azithromycin, such as liver enzyme abnormalities and hearing impairment, is warranted.

[see Adverse Reactions (6) ] 7.2 Warfarin Spontaneous postmarketing reports suggest that concomitant administration of azithromycin may potentiate the effects of oral anticoagulants such as warfarin, although the prothrombin time was not affected in the dedicated drug interaction study with azithromycin and warfarin.

Prothrombin times should be carefully monitored while patients are receiving azithromycin and oral anticoagulants concomitantly.

7.

3 Potential Drug-Drug Interactions with Macrolides Interactions with digoxin or phenytoin have not been reported in clinical trials with azithromycin; however, no specific drug interaction studies have been performed to evaluate potential drug-drug interactions.

However, drug interactions have been observed with other macrolide products.

Until further data are developed regarding drug interactions when digoxin or phenytoin are used concomitantly with azithromycin careful monitoring of patients is advised.

OVERDOSAGE

10 Adverse reactions experienced at higher than recommended doses were similar to those seen at normal doses particularly nausea, diarrhea, and vomiting.

In the event of overdosage, general symptomatic and supportive measures are indicated as required.

DESCRIPTION

11 ZITHROMAX (azithromycin tablets and azithromycin for oral suspension) contain the active ingredient azithromycin, a macrolide antibacterial drug, for oral administration.

Azithromycin has the chemical name (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl) oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one.

Azithromycin is derived from erythromycin; however, it differs chemically from erythromycin in that a methyl-substituted nitrogen atom is incorporated into the lactone ring.

Its molecular formula is C38H72N2O12, and its molecular weight is 749.00.

Azithromycin has the following structural formula: Azithromycin, as the dihydrate, is a white crystalline powder with a molecular formula of C38H72N2O12∙2H2O and a molecular weight of 785.0.

ZITHROMAX is supplied as tablets containing azithromycin dihydrate equivalent to either 250 mg or 500 mg azithromycin and the following inactive ingredients: dibasic calcium phosphate anhydrous, pregelatinized starch, sodium croscarmellose, magnesium stearate, sodium lauryl sulfate, hypromellose, lactose, titanium dioxide, triacetin, and D&C Red #30 aluminum lake.

ZITHROMAX for oral suspension is supplied in bottles containing azithromycin dihydrate powder equivalent to 300 mg, 600 mg, 900 mg, or 1200 mg azithromycin per bottle and the following inactive ingredients: sucrose; sodium phosphate, tribasic, anhydrous; hydroxypropyl cellulose; xanthan gum; FD&C Red #40; and spray dried artificial cherry, creme de vanilla, and banana flavors.

After constitution, each 5 mL of suspension contains 100 mg or 200 mg of azithromycin.

Chemical Structure

CLINICAL STUDIES

14 14.1 Adult Patients Acute Bacterial Exacerbations of Chronic Bronchitis In a randomized, double-blind controlled clinical trial of acute exacerbation of chronic bronchitis (AECB), azithromycin (500 mg once daily for 3 days) was compared with clarithromycin (500 mg twice daily for 10 days).

The primary endpoint of this trial was the clinical cure rate at Days 21– 24.

For the 304 patients analyzed in the modified intent-to-treat analysis at the Days 21–24 visit, the clinical cure rate for 3 days of azithromycin was 85% (125/147) compared to 82% (129/157) for 10 days of clarithromycin.

The following outcomes were the clinical cure rates at the Days 21–24 visit for the bacteriologically evaluable patients by pathogen: Pathogen Azithromycin (3 Days) Clarithromycin (10 Days) S.

pneumoniae 29/32 (91%) 21/27 (78%) H.

influenzae 12/14 (86%) 14/16 (88%) M.

catarrhalis 11/12 (92%) 12/15 (80%) Acute Bacterial Sinusitis In a randomized, double-blind, double-dummy controlled clinical trial of acute bacterial sinusitis, azithromycin (500 mg once daily for 3 days) was compared with amoxicillin/clavulanate (500/125 mg three times a day for 10 days).

Clinical response assessments were made at Day 10 and Day 28.

The primary endpoint of this trial was prospectively defined as the clinical cure rate at Day 28.

For the 594 patients analyzed in the modified intent to treat analysis at the Day 10 visit, the clinical cure rate for 3 days of azithromycin was 88% (268/303) compared to 85% (248/291) for 10 days of amoxicillin/clavulanate.

For the 586 patients analyzed in the modified intent to treat analysis at the Day 28 visit, the clinical cure rate for 3 days of azithromycin was 71.5% (213/298) compared to 71.5% (206/288), with a 97.5% confidence interval of –8.4 to 8.3, for 10 days of amoxicillin/clavulanate.

In an open label, non-comparative study requiring baseline transantral sinus punctures, the following outcomes were the clinical success rates at the Day 7 and Day 28 visits for the modified intent to treat patients administered 500 mg of azithromycin once daily for 3 days with the following pathogens: Clinical Success Rates of Azithromycin (500 mg per day for 3 Days) Pathogen Day 7 Day28 S.

pneumoniae 23/26 (88%) 21/25 (84%) H.

influenzae 28/32 (87%) 24/32 (75%) M.

catarrhalis 14/15 (93%) 13/15 (87%) 14.2 Pediatric Patients From the perspective of evaluating pediatric clinical trials, Days 11–14 were considered on-therapy evaluations because of the extended half-life of azithromycin.

Days 11–14 data are provided for clinical guidance.

Days 24–32 evaluations were considered the primary test of cure endpoint.

Pharyngitis/Tonsillitis In three double-blind controlled studies, conducted in the United States, azithromycin (12 mg/kg once a day for 5 days) was compared to penicillin V (250 mg three times a day for 10 days) in the treatment of pharyngitis due to documented Group A β-hemolytic streptococci (GABHS or S.

pyogenes ).

Azithromycin was clinically and microbiologically statistically superior to penicillin at Day 14 and Day 30 with the following clinical success (i.e., cure and improvement) and bacteriologic efficacy rates (for the combined evaluable patient with documented GABHS): Three U.S.

Streptococcal Pharyngitis Studies Azithromycin vs.

Penicillin V EFFICACY RESULTS Day 14 Day 30 Bacteriologic Eradication: Azithromycin 323/340 (95%) 255/330 (77%) Penicillin V 242/332 (73%) 206/325 (63%) Clinical Success (cure plus improvement): Azithromycin 336/343 (98%) 310/330 (94%) Penicillin V 284/338 (84%) 241/325 (74%) Approximately 1% of azithromycin-susceptible S.

pyogenes isolates were resistant to azithromycin following therapy.

Acute Otitis Media Efficacy using azithromycin given over 5 days (10 mg/kg on Day 1 followed by 5 mg/kg on Days 2–5).

Trial 1 In a double-blind, controlled clinical study of acute otitis media performed in the United States, azithromycin (10 mg/kg on Day 1 followed by 5 mg/kg on Days 2–5) was compared to amoxicillin/clavulanate potassium (4:1).

For the 553 patients who were evaluated for clinical efficacy, the clinical success rate (i.e., cure plus improvement) at the Day 11 visit was 88% for azithromycin and 88% for the control agent.

For the 521 patients who were evaluated at the Day 30 visit, the clinical success rate was 73% for azithromycin and 71% for the control agent.

Trial 2 In a non-comparative clinical and microbiologic trial performed in the United States, where significant rates of beta-lactamase producing organisms (35%) were found, 131 patients were evaluable for clinical efficacy.

The combined clinical success rate (i.e., cure and improvement) at the Day 11 visit was 84% for azithromycin.

For the 122 patients who were evaluated at the Day 30 visit, the clinical success rate was 70% for azithromycin.

Microbiologic determinations were made at the pre-treatment visit.

Microbiology was not reassessed at later visits.

The following clinical success rates were obtained from the evaluable group: Pathogen Day 11 Day 30 Azithromycin Azithromycin S.

pneumoniae 61/74 (82%) 40/56 (71%) H.

influenzae 43/54 (80%) 30/47 (64%) M.

catarrhalis 28/35 (80%) 19/26 (73%) S.

pyogenes 11/11 (100%) 7/7 (100%) Overall 177/217 (82%) 97/137 (73%) Trial 3 In another controlled comparative clinical and microbiologic study of otitis media performed in the United States, azithromycin (10 mg/kg on Day 1 followed by 5 mg/kg on Days 2–5).was compared to amoxicillin/clavulanate potassium (4:1).

This study utilized two of the same investigators as Protocol 2 (above), and these two investigators enrolled 90% of the patients in Protocol 3.

For this reason, Protocol 3 was not considered to be an independent study.

Significant rates of beta-lactamase producing organisms (20%) were found.

Ninety-two (92) patients were evaluable for clinical and microbiologic efficacy.

The combined clinical success rate (i.e., cure and improvement) of those patients with a baseline pathogen at the Day 11 visit was 88% for azithromycin vs.

100% for control; at the Day 30 visit, the clinical success rate was 82% for azithromycin vs.

80% for control.

Microbiologic determinations were made at the pre-treatment visit.

Microbiology was not reassessed at later visits.

At the Day 11 and Day 30 visits, the following clinical success rates were obtained from the evaluable group: Day 11 Day 30 Pathogen Azithromycin Control Azithromycin Control S.

pneumoniae 25/29 (86%) 26/26 (100%) 22/28 (79%) 18/22 (82%) H.

influenzae 9/11 (82%) 9/9 (100%) 8/10 (80%) 6/8 (75%) M.

catarrhalis 7/7 (100%) 5/5 (100%) 5/5 (100%) 2/3 (66%) S.

pyogenes 2/2 (100%) 5/5 (100%) 2/2 (100%) 4/4 (100%) Overall 43/49 (88%) 45/45 (100%) 37/45 (82%) 30/37 (81%) Efficacy using azithromycin given over 3 days (10 mg/kg/day).

Trial 4 In a double-blind, controlled, randomized clinical study of acute otitis media in pediatric patients from 6 months to 12 years of age, azithromycin (10 mg/kg per day for 3 days) was compared to amoxicillin/clavulanate potassium (7:1) in divided doses q12h for 10 days.

Each patient received active drug and placebo matched for the comparator.

For the 366 patients who were evaluated for clinical efficacy at the Day 12 visit, the clinical success rate (i.e., cure plus improvement) was 83% for azithromycin and 88% for the control agent.

For the 362 patients who were evaluated at the Days 24–28 visit, the clinical success rate was 74% for azithromycin and 69% for the control agent.

Efficacy using azithromycin 30 mg/kg given as a single dose Trial 5 A double-blind, controlled, randomized trial was performed at nine clinical centers.

Pediatric patients from 6 months to 12 years of age were randomized 1:1 to treatment with either azithromycin (given at 30 mg/kg as a single dose on Day 1) or amoxicillin/clavulanate potassium (7:1), divided q12h for 10 days.

Each child received active drug, and placebo matched for the comparator.

Clinical response (Cure, Improvement, Failure) was evaluated at End of Therapy (Days 12–16) and Test of Cure (Days 28–32).

Safety was evaluated throughout the trial for all treated subjects.

For the 321 subjects who were evaluated at End of Treatment, the clinical success rate (cure plus improvement) was 87% for azithromycin, and 88% for the comparator.

For the 305 subjects who were evaluated at Test of Cure, the clinical success rate was 75% for both azithromycin and the comparator.

Trial 6 In a non-comparative clinical and microbiological trial, 248 patients from 6 months to 12 years of age with documented acute otitis media were dosed with a single oral dose of azithromycin (30 mg/kg on Day 1).

For the 240 patients who were evaluable for clinical modified Intent-to-Treat (MITT) analysis, the clinical success rate (i.e., cure plus improvement) at Day 10 was 89% and for the 242 patients evaluable at Days 24–28, the clinical success rate (cure) was 85%.

Presumed Bacteriologic Eradication Day 10 Days 24–28 S.

pneumoniae 70/76 (92%) 67/76 (88%) H.

influenzae 30/42 (71%) 28/44 (64%) M.

catarrhalis 10/10 (100%) 10/10 (100%) Overall 110/128 (86%) 105/130 (81%)

HOW SUPPLIED

16 /STORAGE AND HANDLING ZITHROMAX is supplied in the following strengths and package configurations: ZITHROMAX 250 mg tablets are supplied as pink modified capsular shaped, engraved, film-coated tablets containing azithromycin dihydrate equivalent to 250 mg of azithromycin.

ZITHROMAX 250 mg tablets are engraved with “PFIZER” on one side and “306” on the other.

These are packaged in bottles and blister cards of 6 tablets (Z-PAKS ® ) as follows: Bottles of 30 NDC 0069-3060-30 Boxes of 3 (Z-PAKS ® of 6) NDC 0069-3060-75 Unit Dose package of 50 NDC 0069-3060-86 ZITHROMAX 500 mg tablets are supplied as pink modified capsular shaped, engraved, film-coated tablets containing azithromycin dihydrate equivalent to 500 mg of azithromycin.

ZITHROMAX 500 mg tablets are engraved with “Pfizer” on one side and “ZTM500” on the other.

These are packaged in bottles and blister cards of 3 tablets (TRI-PAKS™) as follows: Bottles of 30 NDC 0069-3070-30 Boxes of 3 (TRI-PAKS™ of 3 tablets) NDC 0069-3070-75 Unit Dose package of 50 NDC 0069-3070-86 ZITHROMAX tablets should be stored between 15° to 30°C (59° to 86°F).

ZITHROMAX for oral suspension after constitution contains a flavored suspension.

ZITHROMAX for oral suspension is supplied to provide 100 mg/5 mL or 200 mg/5 mL suspension in bottles as follows: Azithromycin contents per bottle NDC 300 mg 0069-3110-19 600 mg 0069-3120-19 900 mg 0069-3130-19 1200 mg 0069-3140-19 [see Dosage and Administration (2) ] for constitution instructions with each bottle type.

Storage: Store dry powder below 30°C (86°F).

Store constituted suspension between 5° to 30°C (41° to 86°F) and discard when full dosing is completed.

RECENT MAJOR CHANGES

Warnings and Precautions, Hypersensitivity ( 5.1 ) 5/2016

GERIATRIC USE

8.5 Geriatric Use In multiple-dose clinical trials of oral azithromycin, 9% of patients were at least 65 years of age (458/4949) and 3% of patients (144/4949) were at least 75 years of age.

No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in response between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out.

Elderly patients may be more susceptible to development of torsades de pointes arrhythmias than younger patients.

[see Warnings and Precautions (5.3) ]

DOSAGE FORMS AND STRENGTHS

3 ZITHROMAX 250 mg tablets are supplied as pink modified capsular shaped, engraved, film-coated tablets containing azithromycin dihydrate equivalent to 250 mg of azithromycin.

ZITHROMAX 250 mg tablets are engraved with “PFIZER” on one side and “306” on the other.

These are packaged in bottles and blister cards of 6 tablets (Z-PAKS ® ).

ZITHROMAX 500 mg tablets are supplied as pink modified capsular shaped, engraved, film-coated tablets containing azithromycin dihydrate equivalent to 500 mg of azithromycin.

ZITHROMAX 500 mg tablets are engraved with “Pfizer” on one side and “ZTM500” on the other.

These are packaged in bottles and blister cards of 3 tablets (TRI-PAKS™).

ZITHROMAX for oral suspension after constitution contains a flavored suspension.

ZITHROMAX for oral suspension is supplied to provide 100 mg/5 mL or 200 mg/5 mL suspension in bottles.

ZITHROMAX tablets 250 mg and 500 mg ( 3 ) ZITHROMAX for oral suspension 100 mg/5 mL and 200 mg/5 mL ( 3 )

MECHANISM OF ACTION

12.1 Mechanism of Action Azithromycin is a macrolide antibacterial drug.

[see Microbiology (12.4) ]

INDICATIONS AND USAGE

1 To reduce the development of drug-resistant bacteria and maintain the effectiveness of ZITHROMAX (azithromycin) and other antibacterial drugs, ZITHROMAX (azithromycin) should be used only to treat infections that are proven or strongly suspected to be caused by susceptible bacteria.

When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy.

In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

ZITHROMAX (azithromycin) is a macrolide antibacterial drug indicated for the treatment of patients with mild to moderate infections caused by susceptible strains of the designated microorganisms in the specific conditions listed below.

Recommended dosages and durations of therapy in adult and pediatric patient populations vary in these indications.

[see Dosage and Administration (2) ] ZITHROMAX is a macrolide antibacterial drug indicated for mild to moderate infections caused by designated, susceptible bacteria: Acute bacterial exacerbations of chronic bronchitis in adults ( 1.1 ) Acute bacterial sinusitis in adults ( 1.1 ) Uncomplicated skin and skin structure infections in adults ( 1.1 ) Urethritis and cervicitis in adults ( 1.1 ) Genital ulcer disease in men ( 1.1 ) Acute otitis media in pediatric patients ( 1.2 ) Community-acquired pneumonia in adults and pediatric patients ( 1.1 , 1.2 ) Pharyngitis/tonsillitis in adults and pediatric patients ( 1.1 , 1.2 ) Limitation of Use: Azithromycin should not be used in patients with pneumonia who are judged to be inappropriate for oral therapy because of moderate to severe illness or risk factors.

( 1.3 ) To reduce the development of drug-resistant bacteria and maintain the effectiveness of ZITHROMAX (azithromycin) and other antibacterial drugs, ZITHROMAX (azithromycin) should be used only to treat infections that are proven or strongly suspected to be caused by susceptible bacteria.

1.1 Adult Patients Acute bacterial exacerbations of chronic bronchitis due to Haemophilus influenzae , Moraxella catarrhalis, or Streptococcus pneumoniae .

Acute bacterial sinusitis due to Haemophilus influenzae , Moraxella catarrhalis.

or Streptococcus pneumoniae .

Community-acquired pneumonia due to Chlamydophila pneumoniae , Haemophilus influenzae , Mycoplasma pneumoniae, or Streptococcus pneumoniae in patients appropriate for oral therapy.

Pharyngitis/tonsillitis caused by Streptococcus pyogenes as an alternative to first-line therapy in individuals who cannot use first-line therapy.

Uncomplicated skin and skin structure infections due to Staphylococcus aureus , Streptococcus pyogenes , or Streptococcus agalactiae .

Urethritis and cervicitis due to Chlamydia trachomatis or Neisseria gonorrhoeae .

Genital ulcer disease in men due to Haemophilus ducreyi (chancroid).

Due to the small number of women included in clinical trials, the efficacy of azithromycin in the treatment of chancroid in women has not been established.

1.2 Pediatric Patients [see Use in Specific Populations (8.4) and Clinical Studies (14.2) ] Acute otitis media ( >6 months of age) c aused by Haemophilus influenzae , Moraxella catarrhalis, or Streptococcus pneumoniae Community-acquired pneumonia ( >6 months of age) due to Chlamydophila pneumoniae , Haemophilus influenzae , Mycoplasma pneumonia , or Streptococcus pneumoniae in patients appropriate for oral therapy.

Pharyngitis/tonsillitis ( > 2 years of age ) caused by Streptococcus pyogenes as an alternative to first-line therapy in individuals who cannot use first-line therapy.

1.3 Limitations of Use Azithromycin should not be used in patients with pneumonia who are judged to be inappropriate for oral therapy because of moderate to severe illness or risk factors such as any of the following: patients with cystic fibrosis, patients with nosocomial infections, patients with known or suspected bacteremia, patients requiring hospitalization, elderly or debilitated patients, or patients with significant underlying health problems that may compromise their ability to respond to their illness (including immunodeficiency or functional asplenia).

PEDIATRIC USE

8.4 Pediatric Use [see Clinical Pharmacology (12.3) , Indications and Usage (1.2) , and Dosage and Administration (2.2) ] Safety and effectiveness in the treatment of pediatric patients with acute otitis media, acute bacterial sinusitis and community-acquired pneumonia under 6 months of age have not been established.

Use of ZITHROMAX for the treatment of acute bacterial sinusitis and community-acquired pneumonia in pediatric patients (6 months of age or greater) is supported by adequate and well-controlled trials in adults Pharyngitis/Tonsillitis: Safety and effectiveness in the treatment of pediatric patients with pharyngitis/tonsillitis under 2 years of age have not been established.

PREGNANCY

8.1 Pregnancy Teratogenic Effects: Pregnancy Category B: Reproduction studies have been performed in rats and mice at doses up to moderately maternally toxic dose concentrations (i.e., 200 mg/kg/day).

These daily doses in rats and mice, based on body surface area, are estimated to be 4 and 2 times, respectively, an adult daily dose of 500 mg.

In the animal studies, no evidence of harm to the fetus due to azithromycin was found.

There are, however, no adequate and well-controlled studies in pregnant women.

Because animal reproduction studies are not always predictive of human response, azithromycin should be used during pregnancy only if clearly needed.

NUSRING MOTHERS

8.3 Nursing Mothers Azithromycin has been reported to be excreted in human breast milk in small amounts.

Caution should be exercised when azithromycin is administered to a nursing woman.

WARNING AND CAUTIONS

5 WARNINGS AND PRECAUTIONS Serious (including fatal) allergic and skin reactions: Discontinue ZITHROMAX if reaction occurs.

( 5.1 ) Hepatotoxicity: Severe, and sometimes fatal, hepatotoxicity has been reported, Discontinue ZITHROMAX immediately if signs and symptoms of hepatitis occur.

( 5.2 ) Prolongation of QT interval and cases of torsades de pointes have been reported.

This risk which can be fatal should be considered in patients with certain cardiovascular disorders including known QT prolongation or history torsades de pointes, those with proarrhythmic conditions, and with other drugs that prolong the QT interval.

( 5.3 ) Clostridium difficile -associated diarrhea: Evaluate patients if diarrhea occurs.

( 5.4 ) ZITHROMAX may exacerbate muscle weakness in persons with myasthenia gravis.

( 5.5 ) 5.1 Hypersensitivity Serious allergic reactions, including angioedema, anaphylaxis, and dermatologic reactions including Stevens-Johnson syndrome, and toxic epidermal necrolysis have been reported in patients on azithromycin therapy.

[see Contraindications (4.1) ] Fatalities have been reported.

Cases of Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) have also been reported.

Despite initially successful symptomatic treatment of the allergic symptoms, when symptomatic therapy was discontinued, the allergic symptoms recurred soon thereafter in some patients without further azithromycin exposure.

These patients required prolonged periods of observation and symptomatic treatment.

The relationship of these episodes to the long tissue half-life of azithromycin and subsequent prolonged exposure to antigen is presently unknown.

If an allergic reaction occurs, the drug should be discontinued and appropriate therapy should be instituted.

Physicians should be aware that allergic symptoms may reappear when symptomatic therapy has been discontinued.If an allergic reaction occurs, the drug should be discontinued and appropriate therapy should be instituted.

Physicians should be aware that allergic symptoms may reappear when symptomatic therapy has been discontinued.

5.2 Hepatotoxicity Abnormal liver function, hepatitis, cholestatic jaundice, hepatic necrosis, and hepatic failure have been reported, some of which have resulted in death.

Discontinue azithromycin immediately if signs and symptoms of hepatitis occur.

5.3 QT Prolongation Prolonged cardiac repolarization and QT interval, imparting a risk of developing cardiac arrhythmia and torsades de pointes, have been seen with treatment with macrolides, including azithromycin.

Cases of torsades de pointes have been spontaneously reported during postmarketing surveillance in patients receiving azithromycin.

Providers should consider the risk of QT prolongation which can be fatal when weighing the risks and benefits of azithromycin for at-risk groups including: patients with known prolongation of the QT interval, a history of torsades de pointes, congenital long QT syndrome, bradyarrhythmias or uncompensated heart failure patients on drugs known to prolong the QT interval patients with ongoing proarrhythmic conditions such as uncorrected hypokalemia or hypomagnesemia, clinically significant bradycardia, and in patients receiving Class IA (quinidine, procainamide) or Class III (dofetilide, amiodarone, sotalol) antiarrhythmic agents.

Elderly patients may be more susceptible to drug-associated effects on the QT interval.

5.4 Clostridium difficile -Associated Diarrhea (CDAD) Clostridium difficile -associated diarrhea has been reported with use of nearly all antibacterial agents, including ZITHROMAX, and may range in severity from mild diarrhea to fatal colitis.

Treatment with antibacterial agents alters the normal flora of the colon, leading to overgrowth of C.

difficile .

C.

difficile produces toxins A and B which contribute to the development of CDAD.

Hypertoxin producing strains of C.

difficile cause increased morbidity and mortality, as these infections can be refractory to antibacterial therapy and may require colectomy.

CDAD must be considered in all patients who present with diarrhea following antibiotic use.

Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.

If CDAD is suspected or confirmed, ongoing antibiotic use not directed against C.

difficile may need to be discontinued.

Appropriate fluid and electrolyte management, protein supplementation, antibiotic treatment of C.

difficile , and surgical evaluation should be instituted as clinically indicated.

5.5 Exacerbation of Myasthenia Gravis Exacerbation of symptoms of myasthenia gravis and new onset of myasthenic syndrome have been reported in patients receiving azithromycin therapy.

5.6 Use in Sexually Transmitted Infections ZITHROMAX, at the recommended dose, should not be relied upon to treat syphilis.

Antibacterial agents used to treat non-gonococcal urethritis may mask or delay the symptoms of incubating syphilis.

All patients with sexually transmitted urethritis or cervicitis should have a serologic test for syphilis and appropriate testing for gonorrhea performed at the time of diagnosis.

Appropriate antibacterial therapy and follow-up tests for these diseases should be initiated if infection is confirmed.

5.7 Development of Drug-Resistant Bacteria Prescribing ZITHROMAX in the absence of a proven or strongly suspected bacterial infection is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.

INFORMATION FOR PATIENTS

17 PATIENT COUNSELING INFORMATION General Patient Counseling ZITHROMAX tablets and oral suspension can be taken with or without food.

Patients should also be cautioned not to take aluminum- and magnesium-containing antacids and azithromycin simultaneously.

The patient should be directed to discontinue azithromycin immediately and contact a physician if any signs of an allergic reaction occur.

Patients should be counseled that antibacterial drugs including ZITHROMAX (azithromycin) should only be used to treat bacterial infections.

They do not treat viral infections (e.g., the common cold).

When ZITHROMAX (azithromycin) is prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of the therapy, the medication should be taken exactly as directed.

Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by ZITHROMAX (azithromycin) or other antibacterial drugs in the future.

Diarrhea is a common problem caused by antibacterials which usually ends when the antibacterial is discontinued.

Sometimes after starting treatment with antibacterials patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after having taken the last dose of the antibacterial drug.

If this occurs, patients should contact their physician as soon as possible.

See FDA-approved Patient Labeling Licensed from Pliva LAB-0023-16.0

DOSAGE AND ADMINISTRATION

2 Adult Patients ( 2.1 ) Infection Recommended Dose/Duration of Therapy Community-acquired pneumonia (mild severity) Pharyngitis/tonsillitis (second-line therapy) Skin/skin structure (uncomplicated) 500 mg as a single dose on Day 1, followed by 250 mg once daily on Days 2 through 5.

Acute bacterial exacerbations of chronic bronchitis (mild to moderate) 500 mg as a single dose on Day 1, followed by 250 mg once daily on Days 2 through 5 or 500 mg once daily for 3 days.

Acute bacterial sinusitis 500 mg once daily for 3 days.

Genital ulcer disease (chancroid) Non-gonococcal urethritis and cervicitis One single 1 gram dose.

Gonococcal urethritis and cervicitis One single 2 gram dose.

Pediatric Patients ( 2.2 ) Infection Recommended Dose/Duration of Therapy Acute otitis media 30 mg/kg as a single dose or 10 mg/kg once daily for 3 days or 10 mg/kg as a single dose on Day 1 followed by 5 mg/kg/day on Days 2 through 5.

Acute bacterial sinusitis 10 mg/kg once daily for 3 days.

Community-acquired pneumonia 10 mg/kg as a single dose on Day 1 followed by 5 mg/kg once daily on Days 2 through 5.

Pharyngitis/tonsillitis 12 mg/kg once daily for 5 days.

2.1 Adult Patients [see Indications and Usage (1.1) and Clinical Pharmacology (12.3) ] Infection DUE TO THE INDICATED ORGANISMS [see Indications and Usage (1.1)] Recommended Dose/Duration of Therapy Community-acquired pneumonia Pharyngitis/tonsillitis (second-line therapy) Skin/skin structure (uncomplicated) 500 mg as a single dose on Day 1, followed by 250 mg once daily on Days 2 through 5 Acute bacterial exacerbations of chronic obstructive pulmonary disease 500 mg once daily for 3 days OR 500 mg as a single dose on Day 1, followed by 250 mg once daily on Days 2 through 5 Acute bacterial sinusitis 500 mg once daily for 3 days Genital ulcer disease (chancroid) One single 1 gram dose Non-gonococcal urethritis and cervicitis One single 1 gram dose Gonococcal urethritis and cervicitis One single 2 gram dose ZITHROMAX tablets can be taken with or without food.

2.2 Pediatric Patients 1 Infection DUE TO THE INDICATED ORGANISMS [see Indications and Usage (1.2)] Recommended Dose/Duration of Therapy 1 see dosing tables below for maximum doses evaluated by indication Acute otitis media 30 mg/kg as a single dose or 10 mg/kg once daily for 3 days or 10 mg/kg as a single dose on Day 1 followed by 5 mg/kg/day on Days 2 through 5.

Acute bacterial sinusitis 10 mg/kg once daily for 3 days.

Community-acquired pneumonia 10 mg/kg as a single dose on Day 1 followed by 5 mg/kg once daily on Days 2 through 5.

Pharyngitis/tonsillitis 12 mg/kg once daily for 5 days.

ZITHROMAX for oral suspension can be taken with or without food.

PEDIATRIC DOSAGE GUIDELINES FOR OTITIS MEDIA, ACUTE BACTERIAL SINUSITIS, AND COMMUNITY-ACQUIRED PNEUMONIA (Age 6 months and above, [see Use in Specific Populations (8.4) ] ) Based on Body Weight OTITIS MEDIA AND COMMUNITY-ACQUIRED PNEUMONIA: (5-Day Regimen) Effectiveness of the 3-day or 1-day regimen in pediatric patients with community-acquired pneumonia has not been established.

Dosing Calculated on 10 mg/kg/day Day 1 and 5 mg/kg/day Days 2 to 5.

Weight 100 mg/5 mL 200 mg/5 mL Total mL per Treatment Course Total mg per Treatment Course Kg Lbs.

Day 1 Days 2–5 Day 1 Days 2–5 5 11 2.5 mL; (½ tsp) 1.25 mL;(¼ tsp) 7.5 mL 150 mg 10 22 5 mL; (1tsp) 2.5 mL; (½ tsp) 15 mL 300 mg 20 44 5 mL; (1 tsp) 2.5 mL; (½ tsp) 15 mL 600 mg 30 66 7.5 mL; (1½ tsp) 3.75 mL; (¾ tsp) 22.5 mL 900 mg 40 88 10 mL; (2 tsp) 5 mL; (1 tsp) 30 mL 1200 mg 50 and above 110 and above 12.5 mL; (2½ tsp) 6.25 mL; (1¼ tsp) 37.5 mL 1500 mg OTITIS MEDIA AND ACUTE BACTERIAL SINUSITIS: (3-Day Regimen) Effectiveness of the 5-day or 1-day regimen in pediatric patients with acute bacterial sinusitis has not been established.

Dosing Calculated on 10 mg/kg/day.

Weight 100 mg/5 mL 200 mg/5 mL Total mL per Treatment Course Total mg per Treatment Course Kg Lbs.

Days 1–3 Days 1–3 5 11 2.5 mL; (1/2 tsp) 7.5 mL 150 mg 10 22 5 mL; (1 tsp) 15 mL 300 mg 20 44 5 mL (1 tsp) 15 mL 600 mg 30 66 7.5 mL (1½ tsp) 22.5 mL 900 mg 40 88 10 mL (2 tsp) 30 mL 1200 mg 50 and above 110 and above 12.5 mL (2 ½ tsp) 37.5 mL 1500 mg OTITIS MEDIA: (1-Day Regimen) Dosing Calculated on 30 mg/kg as a single dose.

Weight 200 mg/5 mL Total mL per Treatment Course Total mg per Treatment Course Kg Lbs.

1-Day Regimen 5 11 3.75 mL;(3/4 tsp) 3.75 mL 150 mg 10 22 7.5 mL;(1½ tsp) 7.5 mL 300 mg 20 44 15 mL;(3 tsp) 15 mL 600 mg 30 66 22.5 mL;(4½ tsp) 22.5 mL 900 mg 40 88 30 mL;(6 tsp) 30 mL 1200 mg 50 and above 110 and above 37.5 mL;(7½ tsp) 37.5 mL 1500 mg The safety of re-dosing azithromycin in pediatric patients who vomit after receiving 30 mg/kg as a single dose has not been established.

In clinical studies involving 487 patients with acute otitis media given a single 30 mg/kg dose of azithromycin, 8 patients who vomited within 30 minutes of dosing were re-dosed at the same total dose.

Pharyngitis/Tonsillitis: The recommended dose of ZITHROMAX for children with pharyngitis/tonsillitis is 12 mg/kg once daily for 5 days.

(See chart below.) PEDIATRIC DOSAGE GUIDELINES FOR PHARYNGITIS/TONSILLITIS (Age 2 years and above, [see Use in Specific Populations (8.4) ] ) Based on Body Weight PHARYNGITIS/TONSILLITIS: (5-Day Regimen) Dosing Calculated on 12 mg/kg/day for 5 days.

Weight 200 mg/5 mL Total mL per Treatment Course Total mg per Treatment Course Kg Lbs.

Day 1–5 8 18 2.5 mL; (½ tsp) 12.5 mL 500 mg 17 37 5 mL; (1 tsp) 25 mL 1000 mg 25 55 7.5 mL; (1½ tsp) 37.5 mL 1500 mg 33 73 10 mL; (2 tsp) 50 mL 2000 mg 40 88 12.5 mL; (2½ tsp) 62.5 mL 2500 mg Constituting instructions for ZITHROMAX Oral Suspension 300, 600, 900, 1200 mg bottles.

The table below indicates the volume of water to be used for constitution: Amount of water to be added Total volume after constitution (azithromycin content) Azithromycin concentration after constitution 9 mL (300 mg) 15 mL (300 mg) 100 mg/5 mL 9 mL (600 mg) 15 mL (600 mg) 200 mg/5 mL 12 mL (900 mg) 22.5 mL (900 mg) 200 mg/5 mL 15 mL (1200 mg) 30 mL (1200 mg) 200 mg/5 mL Shake well before each use.

Oversized bottle provides shake space.

Keep tightly closed.

After mixing, store suspension at 5° to 30°C (41° to 86°F) and use within 10 days.

Discard after full dosing is completed.

potassium citrate 10 MEQ Extended Release Oral Tablet

Generic Name: POTASSIUM CITRATE
Brand Name: Potassium Citrate
  • Substance Name(s):
  • POTASSIUM CITRATE

DRUG INTERACTIONS

7 The following drug interactions may occur with potassium citrate: Potassium-sparing diuretics: concomitant administration should be avoided since the simultaneous administration of these agents can produce severe hyperkalemia (7.1) Drugs that slow gastrointestinal transit time: These agents (such as anticholinergics) can be expected to increase the gastrointestinal irritation produced by potassium salts (7.2) Renin-angiotensin-aldosterone inhibitors: Monitor for hyperkalemia (7.3) Nonsteroidal Anti-inflammatory drugs (NSAIDs) monitor for hyperkalemia (7.4) 7.1 Potential Effects of Potassium Citrate on Other Drugs Potassium-sparing Diuretics: Concomitant administration of potassium citrate and a potassium-sparing diuretic (such as triamterene, spironolactone or amiloride) should be avoided since the simultaneous administration of these agents can produce severe hyperkalemia.

7.2 Potential Effects of Other Drugs on Potassium Citrate Drugs that slow gastrointestinal transit time: These agents (such as anticholinergics) can be expected to increase the gastrointestinal irritation produced by potassium salts.

7.3 Renin-Angiotensin-Aldosterone System Inhibitors Drugs that inhibit the renin-angiotensin-aldosterone system (RAAS) including angiotensin converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), spironolactone, eplerenone, or aliskiren produce potassium retention by inhibiting aldosterone production.

Closely monitor potassium in patients receiving concomitant RAAS therapy.

7.4 Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) NSAIDs may produce potassium retention by reducing renal synthesis of prostagladin E and impairing the renin-angiotensin system.

Closely monitor potassium in patients on concomitant NSAIDs

OVERDOSAGE

10 Treatment of Overdosage: The administration of potassium salts to persons without predisposing conditions for hyperkalemia rarely causes serious hyperkalemia at recommended dosages.

It is important to recognize that hyperkalemia is usually asymptomatic and may be manifested only by an increased serum potassium concentration and characteristic electrocardiographic changes (peaking of T-wave, loss of P-wave, depression of S-T segment and prolongation of the QT interval).

Late manifestations include muscle paralysis and cardiovascular collapse from cardiac arrest.

Treatment measures for hyperkalemia include the following: Patients should be closely monitored for arrhythmias and electrolyte changes.

Elimination of medications containing potassium and of agents with potassium sparing properties such as potassium-sparing diuretics, ARBs, ACE inhibitors, NSAIDs, certain nutritional supplements and many others.

Elimination of foods containing high levels of potassium such as almonds, apricots, bananas, beans (lima, pinto, white), cantaloupe, carrot juice (canned), figs, grapefruit juice, halibut, milk, oat bran, potato (with skin), salmon, spinach, tuna and many others.

Intravenous calcium gluconate if the patient is at no risk or low risk of developing digitalis toxicity.

Intravenous administration of 300 to 500 mL/hr of 10% dextrose solution containing 10 to 20 units of crystalline insulin per 1,000 mL.

Correction of acidosis, if present, with intravenous sodium bicarbonate.

Hemodialysis or peritoneal dialysis.

Exchange resins may be used.

However, this measure alone is not sufficient for the acute treatment of hyperkalemia.

Lowering potassium levels too rapidly in patients taking digitalis can produce digitalis toxicity.

DESCRIPTION

11 Potassium citrate is a citrate salt of potassium.

Its molecular formula is K 3 C 6 H 5 O 7 • H 2 O, and it has the following chemical structure: Potassium citrate, USP is a transparent crystals or white, granular powder.

It is freely soluble in water and slightly soluble in alcohol.

Potassium citrate extended-release tablets, USP intended for oral administration, each contains 5 mEq (540 mg), 10 mEq (1,080 mg) or 15 mEq (1,620 mg) of potassium citrate, USP as monohydrate.

In addition, each tablet contains the following inactive ingredients: carnauba wax and magnesium stearate.

Meets USP Dissolution Test 2 Potassium citrate

CLINICAL STUDIES

14 The pivotal potassium citrate trials were non-randomized and non-placebo controlled where dietary management may have changed coincidentally with pharmacological treatment.

Therefore, the results as presented in the following sections may overstate the effectiveness of the product.

14.1 Renal Tubular Acidosis (RTA) with Calcium Stones The effect of oral potassium citrate therapy in a non-randomized, non-placebo controlled clinical study of five men and four women with calcium oxalate/calcium phosphate nephrolithiasis and documented incomplete distal renal tubular acidosis was examined.

The main inclusion criterion was a history of stone passage or surgical removal of stones during the 3 years prior to initiation of potassium citrate therapy.

All patients began alkali treatment with 60 to 80 mEq potassium citrate daily in 3 or 4 divided doses.

Throughout treatment, patients were instructed to stay on a sodium restricted diet (100 mEq/day) and to reduce oxalate intake (limited intake of nuts, dark roughage, chocolate and tea).

A moderate calcium restriction (400 to 800 mg/day) was imposed on patients with hypercalciuria.

X-rays of the urinary tract, available in all patients, were reviewed carefully to determine presence of pre-existing stones, appearance of new stones, or change in the number of stones.

Potassium citrate therapy was associated with inhibition of new stone formation in patients with distal tubular acidosis.

Three of the nine patients continued to pass stones during the on-treatment phase.

While it is likely that these patients passed preexisting stones during therapy, the most conservative assumption is that the passed stones were newly formed.

Using this assumption, the stone-passage remission rate was 67%.

All patients had a reduced stone formation rate.

Over the first 2 years of treatment, the on-treatment stone formation rate was reduced from 13±27 to 1±2 per year.

14.2 Hypocitraturic Calcium Oxalate Nephrolithiasis of any Etiology Eighty-nine patients with hypocitraturic calcium nephrolithiasis or uric acid lithiasis with or without calcium nephrolithiasis participated in this non-randomized, non-placebo controlled clinical study.

Four groups of patients were treated with potassium citrate: Group 1 was comprised of 19 patients, 10 with renal tubular acidosis and 9 with chronic diarrheal syndrome, Group 2 was comprised of 37 patients, 5 with uric acid stones alone, 6 with uric acid lithiasis and calcium stones, 3 with type 1 absorptive hypercalciuria, 9 with type 2 absorptive hypercalciuria and 14 with hypocitraturia.

Group 3 was comprised of 15 patients with history of relapse on other therapy and Group 4 was comprised of 18 patients, 9 with type 1 absorptive hypercalciuria and calcium stones, 1 with type 2 absorptive hypercalciuria and calcium stones, 2 with hyperuricosuric calcium oxalate nephrolithiasis, 4 with uric acid lithiasis accompanied by calcium stones and 2 with hypocitraturia and hyperuricemia accompanied by calcium stones.

The dose of potassium citrate ranged from 30 to 100 mEq per day, and usually was 20 mEq administered orally 3 times daily.

Patients were followed in an outpatient setting every 4 months during treatment and were studied over a period from 1 to 4.33 years.

A three-year retrospective pre-study history for stone passage or removal was obtained and corroborated by medical records.

Concomitant therapy (with thiazide or allopurinol) was allowed if patients had hypercalciuria, hyperuricosuria or hyperuricemia.

Group 2 was treated with potassium citrate alone.

In all groups, treatment that included potassium citrate was associated with a sustained increase in urinary citrate excretion from subnormal values to normal values (400 to 700 mg/day), and a sustained increase in urinary pH from 5.6 to 6 to approximately 6.5.

The stone formation rate was reduced in all groups as shown in Table 1.

Table 1 Effect of Potassium Citrate In Patients With Calcium Oxalate Nephrolithiasis.

Stones Formed Per Year Group Baseline On Treatment Remission Remission defined as “the percentage of patients remaining free of newly formed stones during treatment”.

Any Decrease I (n=19) 12 ± 30 0.9 ± 1.3 58% 95% II (n=37) 1.2 ± 2 0.4 ± 1.5 89% 97% III (n=15) 4.2 ± 7 0.7 ± 2 67% 100% IV (n=18) 3.4 ± 8 0.5 ± 2 94% 100% Total (n=89) 4.3 ± 15 0.6 ± 2 80% 98% 14.3 Uric Acid Lithiasis with or without Calcium Stones A long-term non-randomized, non-placebo controlled clinical trial with eighteen adult patients with uric acid lithiasis participated in the study.

Six patients formed only uric acid stones, and the remaining 12 patients formed mixed stones containing both uric acid and calcium salts or formed both uric acid stones (without calcium salts) and calcium stones (without uric acid) on separate occasions.

Eleven of the 18 patients received potassium citrate alone.

Six of the 7 other patients also received allopurinol for hyperuricemia with gouty arthritis, symptomatic hyperuricemia, or hyperuricosuria.

One patient also received hydrochlorothiazide because of unclassified hypercalciuria.

The main inclusion criterion was a history of stone passage or surgical removal of stones during the 3 years prior to initiation of potassium citrate therapy.

All patients received potassium citrate at a dosage of 30 to 80 mEq/day in three-to-four divided doses and were followed every four months for up to 5 years.

While on potassium citrate treatment, urinary pH rose significantly from a low value of 5.3 ± 0.3 to within normal limits (6.2 to 6.5).

Urinary citrate which was low before treatment rose to the high normal range and only one stone was formed in the entire group of 18 patients.

HOW SUPPLIED

16 /STORAGE AND HANDLING Potassium Citrate Extended-release Tablets, 10 mEq are tan to yellowish color, oval shaped, biconvex uncoated tablets debossed with “537” on one side and plain on the other side and are supplied as follows: Unit dose packages of 20 (5 x 4) NDC 68084-850-32 Storage: Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature].

FOR YOUR PROTECTION: Do not use if blister is torn or broken.

DOSAGE FORMS AND STRENGTHS

3 5 mEq tablets are tan to yellowish color, round shaped, biconvex uncoated tablets debossed with “536” on one side and plain on the other side.

10 mEq tablets are tan to yellowish color, oval shaped, biconvex uncoated tablets debossed with “537” on one side and plain on the other side.

15 mEq tablets are tan to yellowish color, oblong shaped, biconvex uncoated tablets debossed with “538” on one side and plain on the other side.

Tablets: 5 mEq, 10 mEq and 15 mEq (3)

MECHANISM OF ACTION

12.1 Mechanism of Action When potassium citrate is given orally, the metabolism of absorbed citrate produces an alkaline load.

The induced alkaline load in turn increases urinary pH and raises urinary citrate by augmenting citrate clearance without measurably altering ultrafilterable serum citrate.

Thus, potassium citrate therapy appears to increase urinary citrate principally by modifying the renal handling of citrate, rather than by increasing the filtered load of citrate.

The increased filtered load of citrate may play some role, however, as in small comparisons of oral citrate and oral bicarbonate, citrate had a greater effect on urinary citrate.

In addition to raising urinary pH and citrate, potassium citrate increases urinary potassium by approximately the amount contained in the medication.

In some patients, potassium citrate causes a transient reduction in urinary calcium.

The changes induced by potassium citrate produce urine that is less conducive to the crystallization of stone-forming salts (calcium oxalate, calcium phosphate and uric acid).

Increased citrate in the urine, by complexing with calcium, decreases calcium ion activity and thus the saturation of calcium oxalate.

Citrate also inhibits the spontaneous nucleation of calcium oxalate and calcium phosphate (brushite).

The increase in urinary pH also decreases calcium ion activity by increasing calcium complexation to dissociated anions.

The rise in urinary pH also increases the ionization of uric acid to the more soluble urate ion.

Potassium citrate therapy does not alter the urinary saturation of calcium phosphate, since the effect of increased citrate complexation of calcium is opposed by the rise in pH-dependent dissociation of phosphate.

Calcium phosphate stones are more stable in alkaline urine.

In the setting of normal renal function, the rise in urinary citrate following a single dose begins by the first hour and lasts for 12 hours.

With multiple doses the rise in citrate excretion reaches its peak by the third day and averts the normally wide circadian fluctuation in urinary citrate, thus maintaining urinary citrate at a higher, more constant level throughout the day.

When the treatment is withdrawn, urinary citrate begins to decline toward the pretreatment level on the first day.

The rise in citrate excretion is directly dependent on the potassium citrate dosage.

Following long-term treatment, potassium citrate at a dosage of 60 mEq/day raises urinary citrate by approximately 400 mg/day and increases urinary pH by approximately 0.7 units.

In patients with severe renal tubular acidosis or chronic diarrheal syndrome where urinary citrate may be very low (<100 mg/day), potassium citrate may be relatively ineffective in raising urinary citrate.

A higher dose of potassium citrate may therefore be required to produce a satisfactory citraturic response.

In patients with renal tubular acidosis in whom urinary pH may be high, potassium citrate produces a relatively small rise in urinary pH.

INDICATIONS AND USAGE

1 Potassium citrate extended-release tablet is a citrate salt of potassium indicated for the management of: Renal tubular acidosis (RTA) with calcium stones (1.1) Hypocitraturic calcium oxalate nephrolithiasis of any etiology (1.2) Uric acid lithiasis with or without calcium stones (1.3) 1.1 Renal Tubular Acidosis (RTA) with Calcium Stones Potassium citrate is indicated for the management of renal tubular acidosis [see Clinical Studies (14.1) ].

1.2 Hypocitraturic Calcium Oxalate Nephrolithiasis of any Etiology Potassium citrate is indicated for the management of Hypocitraturic calcium oxalate nephrolithiasis [see Clinical Studies (14.2) ].

1.3 Uric Acid Lithiasis with or without Calcium Stones Potassium citrate is indicated for the management of Uric acid lithiasis with or without calcium stones [see Clinical Studies (14.3) ].

PEDIATRIC USE

8.4 Pediatric Use Safety and effectiveness in children have not been established.

PREGNANCY

8.1 Pregnancy Animal reproduction studies have not been conducted.

It is also not known whether potassium citrate can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity.

Potassium citrate should be given to a pregnant woman only if clearly needed.

NUSRING MOTHERS

8.3 Nursing Mothers The normal potassium ion content of human milk is about 13 mEq/L.

It is not known if potassium citrate has an effect on this content.

Potassium citrate should be given to a woman who is breastfeeding only if clearly needed.

WARNING AND CAUTIONS

5 WARNINGS AND PRECAUTIONS Hyperkalemia: In patients with impaired mechanisms for excreting potassium, potassium citrate administration can produce hyperkalemia and cardiac arrest.

Potentially fatal hyperkalemia can develop rapidly and be asymptomatic.

The use of potassium citrate in patients with chronic renal failure, or any other condition which impairs potassium excretion such as severe myocardial damage or heart failure, should be avoided (5.1) Gastrointestinal lesions: if there is severe vomiting, abdominal pain or gastrointestinal bleeding, potassium citrate should be discontinued immediately and the possibility of bowel perforation or obstruction investigated (5.2) 5.1 Hyperkalemia In patients with impaired mechanisms for excreting potassium, potassium citrate administration can produce hyperkalemia and cardiac arrest.

Potentially fatal hyperkalemia can develop rapidly and be asymptomatic.

The use of potassium citrate in patients with chronic renal failure, or any other condition which impairs potassium excretion such as severe myocardial damage or heart failure, should be avoided.

Closely monitor for signs of hyperkalemia with periodic blood tests and ECGs.

5.2 Gastrointestinal Lesions Solid dosage forms of potassium chlorides have produced stenotic and/or ulcerative lesions of the small bowel and deaths.

These lesions are caused by a high local concentration of potassium ions in the region of the dissolving tablets, which injured the bowel.

In addition, perhaps because wax-matrix preparations are not enteric-coated and release some of their potassium content in the stomach, there have been reports of upper gastrointestinal bleeding associated with these products.

The frequency of gastrointestinal lesions with wax-matrix potassium chloride products is estimated at one per 100,000 patient-years.

Experience with potassium citrate is limited, but a similar frequency of gastrointestinal lesions should be anticipated.

If there is severe vomiting, abdominal pain or gastrointestinal bleeding, potassium citrate should be discontinued immediately and the possibility of bowel perforation or obstruction investigated.

INFORMATION FOR PATIENTS

17 PATIENT COUNSELING INFORMATION 17.1 Administration of Drug Tell patients to take each dose without crushing, chewing or sucking the tablet.

Tell patients to take this medicine only as directed.

This is especially important if the patient is also taking both diuretics and digitalis preparations.

Tell patients to check with the doctor if there is trouble swallowing tablets or if the tablet seems to stick in the throat.

Tell patients to check with the doctor at once if tarry stools or other evidence of gastrointestinal bleeding is noticed.

Tell patients that their doctor will perform regular blood tests and electrocardiograms to ensure safety.

Call your doctor for medical advice about side effects.

You may report side effects to FDA at 1-800-FDA-1088.

DOSAGE AND ADMINISTRATION

2 Objective: To restore normal urinary citrate (greater than 320 mg/day and as close to the normal mean of 640 mg/day as possible), and to increase urinary pH to a level of 6 to 7.

Severe hypocitraturia (urinary citrate 150 mg/day): therapy should be initiated at 30 mEq per day; a dose of 15 mEq two times per day or 10 mEq three times per day with meals or within 30 minutes after meals or bedtime snack (2.3) 2.1 Dosing Instructions Treatment with extended release potassium citrate should be added to a regimen that limits salt intake (avoidance of foods with high salt content and of added salt at the table) and encourages high fluid intake (urine volume should be at least two liters per day).

The objective of treatment with potassium citrate extended-release tablets is to provide potassium citrate in sufficient dosage to restore normal urinary citrate (greater than 320 mg/day and as close to the normal mean of 640 mg/day as possible), and to increase urinary pH to a level of 6 or 7.

Monitor serum electrolytes (sodium, potassium, chloride and carbon dioxide), serum creatinine and complete blood counts every four months and more frequently in patients with cardiac disease, renal disease or acidosis.

Perform electrocardiograms periodically.

Treatment should be discontinued if there is hyperkalemia, a significant rise in serum creatinine or a significant fall in blood hematocrit or hemoglobin.

2.2 Severe Hypocitraturia In patients with severe hypocitraturia (urinary citrate < 150 mg/day), therapy should be initiated at a dosage of 60 mEq/day (30 mEq two times/day or 20 mEq three times/day with meals or within 30 minutes after meals or bedtime snack).

Twenty-four hour urinary citrate and/or urinary pH measurements should be used to determine the adequacy of the initial dosage and to evaluate the effectiveness of any dosage change.

In addition, urinary citrate and/or pH should be measured every four months.

Doses of potassium citrate extended-release tablets greater than 100 mEq/day have not been studied and should be avoided.

2.3 Mild to Moderate Hypocitraturia In patients with mild to moderate hypocitraturia (urinary citrate > 150 mg/day) therapy should be initiated at 30 mEq/day (15 mEq two times/day or 10 mEq three times/day with meals or within 30 minutes after meals or bedtime snack).

Twenty-four hour urinary citrate and/or urinary pH measurements should be used to determine the adequacy of the initial dosage and to evaluate the effectiveness of any dosage change.

Doses of potassium citrate extended-release tablet greater than 100 mEq/day have not been studied and should be avoided.

Glycopyrrolate 1 MG Oral Tablet

WARNINGS

In the presence of a high environmental temperature, heat prostration (fever and heat stroke due to decreased sweating) can occur with use of glycopyrrolate.

Diarrhea may be an early symptom of incomplete intestinal obstruction, especially in patients with ileostomyor colostomy .

In this instance treatment with this drug would be inappropriate and possibly harmful.

Glycopyrrolate may produce drowsiness and blurred vision.

In this event, the patient should be warned not to engage in activities requiring mental alertness such as operating a motor vehicle or other machinery, or performing hazardous work while taking this drug.

Theoretically, with overdosage, a curare-like action may occur, i.e., neuro-muscular blockade leading to muscular weakness and possible paralysis.

The safety of this drug during pregnancy has not been established.

The use of any drug during pregnancy requires that potential benefits of the drug be weighed against possible hazards to mother and child.

Reproduction studies in rats revealed no teratogenic effects from glycopyrrolate; however, the potent anticholinergic action of this agent resulted in diminished rates of conception and of survival at weaning, in a dose-related manner.

Other studies in dogs suggest that this may be due to diminished seminal secretion which is evident at high doses of glycopyrrolate.

Information on possible adverse effects in the pregnant female is limited to uncontrolled data derived from marketing experience.

Such experience has revealed no reports of teratogenic or other fetus-damaging potential.

No controlled studies to establish the safety of the drug in pregnancy have been performed.

It is not known whether this drug is excreted in human milk.

As a general rule, nursing should not be undertaken while a patient is on a drug since many drugs are excreted in human milk.

Since there is no adequate experience in pediatric patients who have received this drug, safety and efficacy in pediatric patients have not been established.

DRUG INTERACTIONS

There are no known drug interactions.

OVERDOSAGE

The symptoms of overdosage of glycopyrrolate are peripheral in nature rather than central.

To guard against further absorption of the drug-use gastric lavage, cathartics and/or enemas.

To combat peripheral anticholinergic effects (residual mydriasis, dry mouth, etc.)-utilize a quaternary ammonium anticholinesterase, such as neostigmine methylsulfate.

To combat hypotension-use pressor amines (norepinephrine, metaraminol) i.v.; and supportive care.

To combat respiratory depression-administer oxygen; utilize a respiratory stimulant such as Dopram®* i.v.; artificial respiration.

DESCRIPTION

Glycopyrrolate tablets contain the synthetic anticholinergic glycopyrrolate.

Glycopyrrolate is a quaternary ammonium compound with the following chemical name: 3-[(cyclopentylhydroxyphenylacetyl)oxy]-1,1-dimethylpyrrolidinium bromide.

Its empirical formula is C 19 H 28 BrNO 3 , its molecular weight is 398.33, and its structural formula is: Each 1 mg tablet contains: Glycopyrrolate, USP 1mg Each 2 mg tablet contains: Glycopyrrolate, USP 2mg Inactive Ingredients: Dibasic Calcium Phosphate, Lactose, Magnesium Stearate, Povidone, Sodium Starch Glycolate MM1

HOW SUPPLIED

Glycopyrrolate tablets 1 mg are bisected, compressed white, round tablets debossed “K” above the bisect and “400” below the bisect on one side of the tablet, and plain on the other side.

Available in bottles of 100 (NDC 49884-065-01).

Glycopyrrolate tablets 2 mg are bisected, compressed white, round tablets debossed “K” above the bisect and “401” below the bisect on one side of the tablet, and plain on the other side.

Available in bottles of 100 (NDC 49884-066-01).

Store at 20°-25°C (68°-77°F); excursions permitted to 15°-30°C (59°-86°F) [see USP Controlled Room Temperature].

Dispense in tight container.

Rx only * Dopram ® is a registered trademark of Baxter Healthcare Corporation.

Manufactured by: Par Pharmaceutical Companies, Inc.

Spring Valley, NY 10977 Rev: 07/2010 OS065-01-1-02

INDICATIONS AND USAGE

INDICATIONS & USAGE For use as adjunctive therapy in the treatment of peptic ulcer.

DOSAGE AND ADMINISTRATION

DOSAGE & ADMINISTRATION The dosage of glycopyrrolate should be adjusted to the needs of the individual patient to assure symptomatic control with a minimum of adverse reactions.

The presently recommended maximum daily dosage of glycopyrrolate is 8 mg.

Glycopyrrolate Tablets 1 mg.

The recommended initial dosage of glycopyrrolate for adults is one tablet three times daily (in the morning, early afternoon, and at bedtime).

Some patients may require two tablets at bedtime to assure overnight control of symptoms.

For maintenance, a dosage of one tablet twice a day is frequently adequate.

Glycopyrrolate Tablets 2 mg.

The recommended dosage of glycopyrrolate for adults is one tablet two or three times daily at equally spaced intervals.

Glycopyrrolate tablets are not recommended for use in pediatric patients under the age of 12 years.

lamoTRIgine 200 MG 24HR Extended Release Oral Tablet

DRUG INTERACTIONS

7 Valproate increases lamotrigine concentrations more than 2-fold.

( 7 , 12.3 ) Carbamazepine, phenytoin, phenobarbital, primidone, and rifampin decrease lamotrigine concentrations by approximately 40%.

( 7 , 12.3 ) Estrogen-containing oral contraceptives decrease lamotrigine concentrations by approximately 50%.

( 7 , 12.3 ) Protease inhibitors lopinavir/ritonavir and atazanavir/lopinavir decrease lamotrigine exposure by approximately 50% and 32%, respectively.

( 7 , 12.3 ) Coadministration with organic cationic transporter 2 substrates with narrow therapeutic index is not recommended ( 7 , 12.3 ) Significant drug interactions with lamotrigine are summarized in this section.

Additional details of these drug interaction studies, which were conducted using immediate-release lamotrigine, are provided in the Clinical Pharmacology section [ see Clinical Pharmacology (12.3) ].

Table 5.

Established and Other Potentially Significant Drug Interactions ↓ = Decreased (induces lamotrigine glucuronidation).

↑ = Increased (inhibits lamotrigine glucuronidation).

? = Conflicting data.

Concomitant Drug Effect on Concentration of Lamotrigine or Concomitant Drug Clinical Comment Estrogen-containing oral contraceptive preparations containing 30 mcg ethinylestradiol and 150 mcg levonorgestrel ↓ lamotrigine ↓ levonorgestrel Decreased lamotrigine concentrations approximately 50%.

Decrease in levonorgestrel component by 19%.

Carbamazepine and carbamazepine epoxide ↓ lamotrigine ? carbamazepine epoxide Addition of carbamazepine decreases lamotrigine concentration approximately 40%.

May increase carbamazepine epoxide levels.

Lopinavir/ritonavir ↓ lamotrigine Decreased lamotrigine concentration approximately 50%.

Atazanavir/ritonavir ↓ lamotrigine Decreased lamotrigine AUC approximately 32%.

Phenobarbital/primidone ↓ lamotrigine Decreased lamotrigine concentration approximately 40%.

Phenytoin ↓ lamotrigine Decreased lamotrigine concentration approximately 40%.

Rifampin ↓ lamotrigine Decreased lamotrigine AUC approximately 40%.

Valproate ↑ lamotrigine ? valproate Increased lamotrigine concentrations slightly more than 2-fold.

There are conflicting study results regarding effect of lamotrigine on valproate concentrations: 1) a mean 25% decrease in valproate concentrations in healthy volunteers, 2) no change in valproate concentrations in controlled clinical trials in patients with epilepsy.

Effect of Lamotrigine Extended-Release Tablets on Organic Cationic Transporter 2 Substrates Lamotrigine is an inhibitor of renal tubular secretion via organic cationic transporter 2 (OCT2) proteins [see Clinical Pharmacology (12.3) ] .

This may result in increased plasma levels of certain drugs that are substantially excreted via this route.

Coadministration of lamotrigine extended-release tablets with OCT2 substrates with a narrow therapeutic index (e.g., dofetilide) is not recommended.

OVERDOSAGE

10 10.1 Human Overdose Experience Overdoses involving quantities up to 15 g have been reported for immediate-release lamotrigine, some of which have been fatal.

Overdose has resulted in ataxia, nystagmus, seizures (including tonic-clonic seizures), decreased level of consciousness, coma, and intraventricular conduction delay.

10.2 Management of Overdose There are no specific antidotes for lamotrigine.

Following a suspected overdose, hospitalization of the patient is advised.

General supportive care is indicated, including frequent monitoring of vital signs and close observation of the patient.

If indicated, emesis should be induced; usual precautions should be taken to protect the airway.

It is uncertain whether hemodialysis is an effective means of removing lamotrigine from the blood.

In 6 renal failure patients, about 20% of the amount of lamotrigine in the body was removed by hemodialysis during a 4-hour session.

A Poison Control Center should be contacted for information on the management of overdosage of lamotrigine extended-release tablets.

DESCRIPTION

11 Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs.

Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09.

Lamotrigine is a white or almost white powder and has a pK a of 5.7.

Lamotrigine is very slightly soluble in water and in 0.1M hydrochloric acid.

The structural formula is: Lamotrigine extended-release tablets are supplied for oral administration as 25 mg (yellow, enteric-coated, circular shaped tablet), 50 mg (pink, enteric-coated, circular shaped tablet), 100 mg (light brown, enteric-coated, circular shaped tablet), 200 mg (pink, enteric-coated, circular shaped tablet), and 300 mg (pink, enteric-coated, circular shaped tablet).

Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: diethyl phthalate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid copolymer, polyethylene glycol, talc, titanium dioxide, iron oxide yellow for (25 mg and 100 mg) and iron oxide red for (50 mg, 100 mg, 200 mg, and 300 mg).

Lamotrigine extended-release tablets contain a modified-release eroding formulation as the core.

The tablets are coated with enteric coat to enable a controlled release of drug in the acidic environment of the stomach.

The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels.

Structure

CLINICAL STUDIES

14 14.1 Adjunctive Therapy for Primary Generalized Tonic-Clonic Seizures The effectiveness of lamotrigine extended-release tablets as adjunctive therapy in subjects with PGTC seizures was established in a 19-week, international, multicenter, double-blind, randomized, placebo-controlled trial in 143 patients aged 13 years and older (n = 70 on lamotrigine extended-release tablets, n = 73 on placebo).

Patients with at least 3 PGTC seizures during an 8-week baseline phase were randomized to 19 weeks of treatment with lamotrigine extended-release tablets or placebo added to their current AED regimen of up to 2 drugs.

Patients were dosed on a fixed-dose regimen, with target doses ranging from 200 to 500 mg/day of lamotrigine extended-release tablets based on concomitant AEDs (target dose = 200 mg for valproate, 300 mg for AEDs not altering plasma lamotrigine levels, and 500 mg for enzyme-inducing AEDs).

The primary efficacy endpoint was percent change from baseline in PGTC seizure frequency during the double-blind treatment phase.

For the intent-to-treat population, the median percent reduction in PGTC seizure frequency was 75% in patients treated with lamotrigine extended-release tablets and 32% in patients treated with placebo, a difference that was statistically significant, defined as a 2-sided P value ≤0.05.

Figure 1 presents the percentage of patients (X-axis) with a percent reduction in PGTC seizure frequency (responder rate) from baseline through the entire treatment period at least as great as that represented on the Y-axis.

A positive value on the Y-axis indicates an improvement from baseline (i.e., a decrease in seizure frequency), while a negative value indicates a worsening from baseline (i.e., an increase in seizure frequency).

Thus, in a display of this type, a curve for an effective treatment is shifted to the left of the curve for placebo.

The proportion of patients achieving any particular level of reduction in PGTC seizure frequency was consistently higher for the group treated with lamotrigine extended-release tablets compared with the placebo group.

For example, 70% of patients randomized to lamotrigine extended-release tablets experienced a 50% or greater reduction in PGTC seizure frequency, compared with 32% of patients randomized to placebo.

Patients with an increase in seizure frequency >100% are represented on the Y-axis as equal to or greater than -100%.

Figure 1.

Proportion of Patients by Responder Rate for Lamotrigine Extended-Release Tablets and Placebo Group (Primary Generalized Tonic-Clonic Seizures Study) Figure 1 14.2 Adjunctive Therapy for Partial-Onset Seizures The effectiveness of immediate-release lamotrigine as adjunctive therapy was initially established in 3 pivotal, multicenter, placebo-controlled, double-blind clinical trials in 355 adults with refractory partial-onset seizures.

The effectiveness of lamotrigine extended-release tablets as adjunctive therapy in partial-onset seizures, with or without secondary generalization, was established in a 19-week, multicenter, double-blind, placebo-controlled trial in 236 patients aged 13 years and older (approximately 93% of patients were aged 16 to 65 years).

Approximately 36% were from the U.S.

and approximately 64% were from other countries including Argentina, Brazil, Chile, Germany, India, Korea, Russian Federation, and Ukraine.

Patients with at least 8 partial-onset seizures during an 8-week prospective baseline phase (or 4-week prospective baseline coupled with a 4-week historical baseline documented with seizure diary data) were randomized to treatment with lamotrigine extended-release tablets (n = 116) or placebo (n = 120) added to their current regimen of 1 or 2 AEDs.

Approximately half of the patients were taking 2 concomitant AEDs at baseline.

Target doses ranged from 200 to 500 mg/day of lamotrigine extended-release tablets based on concomitant AED (target dose = 200 mg for valproate, 300 mg for AEDs not altering plasma lamotrigine, and 500 mg for enzyme-inducing AEDs).

The median partial seizure frequency per week at baseline was 2.3 for lamotrigine extended-release tablets and 2.1 for placebo.

The primary endpoint was the median percent change from baseline in partial-onset seizure frequency during the entire double-blind treatment phase.

The median percent reductions in weekly partial-onset seizures were 47% in patients treated with lamotrigine extended-release tablets and 25% on placebo, a difference that was statistically significant, defined as a 2-sided P value ≤0.05.

Figure 2 presents the percentage of patients (X-axis) with a percent reduction in partial-onset seizure frequency (responder rate) from baseline through the entire treatment period at least as great as that represented on the Y-axis.

The proportion of patients achieving any particular level of reduction in partial-onset seizure frequency was consistently higher for the group treated with lamotrigine extended-release tablets compared with the placebo group.

For example, 44% of patients randomized to lamotrigine extended-release tablets experienced a 50% or greater reduction in partial-onset seizure frequency compared with 21% of patients randomized to placebo.

Figure 2.

Proportion of Patients by Responder Rate for Lamotrigine Extended-Release Tablets and Placebo Group (Partial-Onset Seizure Study) Figure 2 14.3 Conversion to Monotherapy for Partial-Onset Seizures The effectiveness of lamotrigine extended-release tablets as monotherapy for partial-onset seizures was established in a historical control trial in 223 adults with partial-onset seizures.

The historical control methodology is described in a publication by French, et al.

[ see References (15) ].

Briefly, in this study, patients were randomized to ultimately receive either lamotrigine extended-release tablets 300 or 250 mg once a day, and their responses were compared with those of a historical control group.

The historical control consisted of a pooled analysis of the control groups from 8 studies of similar design, which utilized a subtherapeutic dose of an AED as a comparator.

Statistical superiority to the historical control was considered to be demonstrated if the upper 95% confidence interval for the proportion of patients meeting escape criteria in patients receiving lamotrigine extended-release tablets remained below the lower 95% prediction interval of 65.3% derived from the historical control data.

In this study, patients aged 13 years and older experienced at least 4 partial-onset seizures during an 8-week baseline period with at least 1 seizure occurring during each of 2 consecutive 4-week periods while receiving valproate or a non-enzyme-inducing AED.

Lamotrigine extended-release tablet was added to either valproate or a non-enzyme-inducing AED over a 6- to 7-week period followed by the gradual withdrawal of the background AED.

Patients were then continued on monotherapy with lamotrigine extended-release tablets for 12 weeks.

The escape criteria were 1 or more of the following: (1) doubling of average monthly seizure count during any 28 consecutive days, (2) doubling of highest consecutive 2-day seizure frequency during the entire treatment phase, (3) emergence of a new seizure type compared with baseline (4) clinically significant prolongation of generalized tonic-clonic seizures or worsening of seizure considered by the investigator to require intervention.

These criteria were similar to those in the 8 controlled trials from which the historical control group was constituted.

The upper 95% confidence limits of the proportion of subjects meeting escape criteria (40.2% at 300 mg/day and 44.5% at 250 mg/day) were below the threshold of 65.3% derived from the historical control data.

Although the study population was not fully comparable with the historical controlled population and the study was not fully blinded, numerous sensitivity analyses supported the primary results.

Efficacy was further supported by the established effectiveness of the immediate-release formulation as monotherapy.

HOW SUPPLIED

16 /STORAGE AND HANDLING Lamotrigine extended-release tablets 25 mg are available as yellow, enteric-coated, circular shaped tablets, debossed with “W” on one side and “271” on the other side.

NDC 64679-271-01, bottle of 30 tablets NDC 64679-271-02, bottle of 500 tablets NDC 64679-271-04, unit dose of 100 tablets 50 mg are available as pink, enteric-coated, circular shaped tablets, debossed with “W” on one side and “274” on the other side.

NDC 64679-274-01, bottle of 30 tablets NDC 64679-274-02, bottle of 500 tablets NDC 64679-274-03, unit dose of 100 tablets 100 mg are available as light brown, enteric-coated, circular shaped tablets, debossed with “W” on one side and “273” on the other side.

NDC 64679-273-01, bottle of 30 tablets NDC 64679-273-02, bottle of 500 tablets NDC 64679-273-04, unit dose of 100 tablets 200 mg are available as pink, enteric-coated, circular shaped tablets, debossed with “W” on one side and “272” on the other side.

NDC 64679-272-01, bottle of 30 tablets NDC 64679-272-02, bottle of 500 tablets NDC 64679-272-04, unit dose of 100 tablets 300 mg are available as pink, enteric-coated, circular shaped tablets, debossed with “W” on one side and “275” on the other side.

NDC 64679-275-01, bottle of 30 tablets NDC 64679-275-02, bottle of 500 tablets NDC 64679-275-04, unit dose of 100 tablets Storage Store at 20°-25°C (68°-77°F); [see USP Controlled Room Temperature].

RECENT MAJOR CHANGES

Dosage and Administration ( 2.1 , 2.2 ) 12/2014 Warnings and Precautions, Laboratory Tests ( 5.13 ) 3/2015

GERIATRIC USE

8.5 Geriatric Use Clinical trials of lamotrigine extended-release tablets for epilepsy did not include sufficient numbers of patients aged 65 years and older to determine whether they respond differently from younger patients or exhibit a different safety profile than that of younger patients.

In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function and of concomitant disease or other drug therapy.

DOSAGE FORMS AND STRENGTHS

3 Extended-release tablets: 25 mg, 50 mg, 100 mg, 200 mg, and 300 mg.

( 3.1 , 16 ) 3.1 Extended-Release Tablets 25 mg, yellow, enteric-coated, circular shaped tablet, debossed with “W” on one side and “271” on the other side.

50 mg, pink, enteric-coated, circular shaped tablet, debossed with “W” on one side and “274” on the other side.

100 mg, light brown, enteric-coated, circular shaped tablet, debossed with “W” on one side and “273” on the other side.

200 mg, pink, enteric-coated, circular shaped tablet, debossed with “W” on one side and “272” on the other side.

300 mg, pink, enteric-coated, circular shaped tablet, debossed with “W” on one side and “275” on the other side.

MECHANISM OF ACTION

12.1 Mechanism of Action The precise mechanism(s) by which lamotrigine exerts its anticonvulsant action are unknown.

In animal models designed to detect anticonvulsant activity, lamotrigine was effective in preventing seizure spread in the maximum electroshock (MES) and pentylenetetrazol (scMet) tests, and prevented seizures in the visually and electrically evoked after-discharge (EEAD) tests for antiepileptic activity.

Lamotrigine also displayed inhibitory properties in a kindling model in rats both during kindling development and in the fully kindled state.

The relevance of these models to human epilepsy, however, is not known.

One proposed mechanism of action of lamotrigine, the relevance of which remains to be established in humans, involves an effect on sodium channels.

In vitro pharmacological studies suggest that lamotrigine inhibits voltage-sensitive sodium channels, thereby stabilizing neuronal membranes and consequently modulating presynaptic transmitter release of excitatory amino acids (e.g., glutamate and aspartate).

Effect of Lamotrigine on N-Methyl d-Aspartate-Receptor Mediated Activity Lamotrigine did not inhibit N-methyl d-aspartate (NMDA)-induced depolarizations in rat cortical slices or NMDA-induced cyclic GMP formation in immature rat cerebellum, nor did lamotrigine displace compounds that are either competitive or noncompetitive ligands at this glutamate receptor complex (CNQX, CGS, TCHP).

The IC 50 for lamotrigine effects on NMDA-induced currents (in the presence of 3 microM of glycine) in cultured hippocampal neurons exceeded 100 microM.

INDICATIONS AND USAGE

1 Lamotrigine extended-release tablet is an antiepileptic drug (AED) indicated for: Adjunctive therapy for primary generalized tonic-clonic seizures and partial-onset seizures with or without secondary generalization in patients aged 13 years and older.

( 1.1 ) Conversion to monotherapy in patients aged 13 years and older with partial-onset seizures who are receiving treatment with a single AED.

( 1.2 ) Limitation of use: Safety and effectiveness in patients younger than 13 years have not been established.

( 1.3 ) 1.1 Adjunctive Therapy Lamotrigine extended-release tablets are indicated as adjunctive therapy for primary generalized tonic-clonic (PGTC) seizures and partial-onset seizures with or without secondary generalization in patients aged 13 years and older.

1.2 Monotherapy Lamotrigine extended-release tablets are is indicated for conversion to monotherapy in patients aged 13 years and older with partial-onset seizures who are receiving treatment with a single antiepileptic drug (AED).

Safety and effectiveness of lamotrigine extended-release tablets have not been established (1) as initial monotherapy or (2) for simultaneous conversion to monotherapy from 2 or more concomitant AEDs.

1.3 Limitation of Use Safety and effectiveness of lamotrigine extended-release tablets for use in patients younger than 13 years have not been established.

PEDIATRIC USE

8.4 Pediatric Use Lamotrigine extended-release tablet is indicated as adjunctive therapy for PGTC and partial-onset seizures with or without secondary generalization in patients aged 13 years and older.

Safety and effectiveness of lamotrigine extended-release tablets for any use in patients younger than 13 years have not been established.

Immediate-release lamotrigine is indicated as adjunctive therapy in patients aged 2 years and older for partial-onset seizures, the generalized seizures of Lennox-Gastaut syndrome, and PGTC seizures.

Safety and efficacy of immediate-release lamotrigine used as adjunctive treatment for partial-onset seizures were not demonstrated in a small, randomized, double-blind, placebo-controlled withdrawal trial in very young pediatric patients (aged 1 to 24 months).

Immediate-release lamotrigine was associated with an increased risk for infectious adverse reactions (lamotrigine 37%, placebo 5%), and respiratory adverse reactions (lamotrigine 26%, placebo 5%).

Infectious adverse reactions included bronchiolitis, bronchitis, ear infection, eye infection, otitis externa, pharyngitis, urinary tract infection, and viral infection.

Respiratory adverse reactions included nasal congestion, cough, and apnea.

In a juvenile animal study in which lamotrigine (oral doses of 5, 15, or 30 mg/kg) was administered to young rats (postnatal days 7 to 62), decreased viability and growth were seen at the highest dose tested and long-term behavioral abnormalities (decreased locomotor activity, increased reactivity, and learning deficits in animals tested as adults) were observed at the 2 highest doses.

The no-effect dose for adverse effects on neurobehavioral development is less than the human dose of 400 mg/day on a mg/m 2 basis.

PREGNANCY

8.1 Pregnancy As with other AEDs, physiological changes during pregnancy may affect lamotrigine concentrations and/or therapeutic effect.

There have been reports of decreased lamotrigine concentrations during pregnancy and restoration of pre-partum concentrations after delivery.

Dosage adjustments may be necessary to maintain clinical response.

Pregnancy Category C There are no adequate and well-controlled studies in pregnant women.

In animal studies, lamotrigine was developmentally toxic at doses lower than those administered clinically.

Lamotrigine extended-release tablets should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

When lamotrigine was administered to pregnant mice, rats, or rabbits during the period of organogenesis (oral doses of up to 125, 25, and 30 mg/kg, respectively), reduced fetal body weight and increased incidences of fetal skeletal variations were seen in mice and rats at doses that were also maternally toxic.

The no-effect doses for embryofetal developmental toxicity in mice, rats, and rabbits (75, 6.25, and 30 mg/kg, respectively) are similar to (mice and rabbits) or less than (rats) the human dose of 400 mg/day on a body surface area (mg/m 2 ) basis.

In a study in which pregnant rats were administered lamotrigine (oral doses of 5 or 25 mg/kg) during the period of organogenesis and offspring were evaluated postnatally, behavioral abnormalities were observed in exposed offspring at both doses.

The lowest effect dose for developmental neurotoxicity in rats is less than the human dose of 400 mg/day on a mg/m 2 basis.

Maternal toxicity was observed at the higher dose tested.

When pregnant rats were administered lamotrigine (oral doses of 5, 10, or 20 mg/kg) during the latter part of gestation, increased offspring mortality (including stillbirths) was seen at all doses.

The lowest effect dose for peri/postnatal developmental toxicity in rats is less than the human dose of 400 mg/day on a mg/m 2 basis.

Maternal toxicity was observed at the 2 highest doses tested.

Lamotrigine decreases fetal folate concentrations in rat, an effect known to be associated with adverse pregnancy outcomes in animals and humans.

Pregnancy Registry To provide information regarding the effects of in utero exposure to lamotrigine extended-release tablets, physicians are advised to recommend that pregnant patients taking lamotrigine extended-release tablets enroll in the North American Antiepileptic Drug (NAAED) Pregnancy Registry.

This can be done by calling the toll-free number 1-888-233-2334 and must be done by patients themselves.

Information on the registry can also be found at the website http://www.aedpregnancyregistry.org.

NUSRING MOTHERS

8.3 Nursing Mothers Lamotrigine is present in milk from lactating women taking lamotrigine extended-release tablets.

Data from multiple small studies indicate that lamotrigine plasma levels in human milk-fed infants have been reported to be as high as 50% of the maternal serum levels.

Neonates and young infants are at risk for high serum levels because maternal serum and milk levels can rise to high levels postpartum if lamotrigine dosage has been increased during pregnancy but not later reduced to the pre-pregnancy dosage.

Lamotrigine exposure is further increased due to the immaturity of the infant glucuronidation capacity needed for drug clearance.

Events including apnea, drowsiness, and poor sucking have been reported in infants who have been human milk-fed by mothers using lamotrigine; whether or not these events were caused by lamotrigine is unknown.

Human milk-fed infants should be closely monitored for adverse events resulting from lamotrigine.

Measurement of infant serum levels should be performed to rule out toxicity if concerns arise.

Human milk-feeding should be discontinued in infants with lamotrigine toxicity.

Caution should be exercised when lamotrigine extended-release tablets are administered to a nursing woman.

BOXED WARNING

WARNING: SERIOUS SKIN RASHES WARNING: SERIOUS SKIN RASHES See full prescribing information for complete boxed warning.

Cases of life-threatening serious rashes, including Stevens-Johnson syndrome and toxic epidermal necrolysis, and/or rash-related death have been caused by lamotrigine.

The rate of serious rash is greater in pediatric patients than in adults.

Additional factors that may increase the risk of rash include: coadministration with valproate.

exceeding recommended initial dose of lamotrigine extended-release tablets.

exceeding recommended dose escalation for lamotrigine extended-release tablets.

( 5.1 ) Benign rashes are also caused by lamotrigine; however, it is not possible to predict which rashes will prove to be serious or life threatening.

Lamotrigine extended-release tablets should be discontinued at the first sign of rash, unless the rash is clearly not drug related.

( 5.1 ) Lamotrigine extended-release tablets can cause serious rashes requiring hospitalization and discontinuation of treatment.

The incidence of these rashes, which have included Stevens-Johnson syndrome, is approximately 0.8% (8 per 1,000) in pediatric patients (aged 2 to 16 years) receiving immediate-release lamotrigine as adjunctive therapy for epilepsy and 0.3% (3 per 1,000) in adults on adjunctive therapy for epilepsy.

In a prospectively followed cohort of 1,983 pediatric patients (aged 2 to 16 years) with epilepsy taking adjunctive immediate-release lamotrigine, there was 1 rash-related death.

Lamotrigine extended-release tablet is not approved for patients younger than 13 years.

In worldwide postmarketing experience, rare cases of toxic epidermal necrolysis and/or rash-related death have been reported in adult and pediatric patients, but their numbers are too few to permit a precise estimate of the rate.

The risk of serious rash caused by treatment with lamotrigine extended-release tablet is not expected to differ from that with immediate-release lamotrigine.

However, the relatively limited treatment experience with lamotrigine extended-release tablets makes it difficult to characterize the frequency and risk of serious rashes caused by treatment with lamotrigine extended-release tablets.

Other than age, there are as yet no factors identified that are known to predict the risk of occurrence or the severity of rash caused by lamotrigine extended-release tablets.

There are suggestions, yet to be proven, that the risk of rash may also be increased by (1) coadministration of lamotrigine extended-release tablets with valproate (includes valproic acid and divalproex sodium), (2) exceeding the recommended initial dose of lamotrigine extended-release tablets, or (3) exceeding the recommended dose escalation for lamotrigine extended-release tablets.

However, cases have occurred in the absence of these factors.

Nearly all cases of life-threatening rashes caused by immediate-release lamotrigine have occurred within 2 to 8 weeks of treatment initiation.

However, isolated cases have occurred after prolonged treatment (e.g., 6 months).

Accordingly, duration of therapy cannot be relied upon as means to predict the potential risk heralded by the first appearance of a rash.

Although benign rashes are also caused by lamotrigine extended-release tablets, it is not possible to predict reliably which rashes will prove to be serious or life threatening.

Accordingly, lamotrigine extended-release tablets should ordinarily be discontinued at the first sign of rash, unless the rash is clearly not drug related.

Discontinuation of treatment may not prevent a rash from becoming life threatening or permanently disabling or disfiguring [ see Warnings and Precautions (5.1) ].

WARNING AND CAUTIONS

5 WARNINGS AND PRECAUTIONS Life-threatening serious rash and/or rash-related death: Discontinue at the first sign of rash, unless the rash is clearly not drug related.

( Boxed Warning , 5.1 ) Fatal or life-threatening hypersensitivity reaction: Multiorgan hypersensitivity reactions, also known as drug reaction with eosinophilia and systemic symptoms (DRESS), may be fatal or life threatening.

Early signs may include rash, fever, and lymphadenopathy.

These reactions may be associated with other organ involvement, such as hepatitis, hepatic failure, blood dyscrasias, or acute multiorgan failure.

Lamotrigine extended-release tablets should be discontinued if alternate etiology for this reaction is not found.

( 5.2 ) Blood dyscrasias (e.g., neutropenia, thrombocytopenia, pancytopenia): May occur, either with or without an associated hypersensitivity syndrome.

Monitor for signs of anemia, unexpected infection, or bleeding.

( 5.3 ) Suicidal behavior and ideation: Monitor for suicidal thoughts or behaviors.

( 5.4 ) Aseptic meningitis: Monitor for signs of meningitis.

( 5.5 ) Medication errors due to product name confusion: Strongly advise patients to visually inspect tablets to verify the received drug is correct.

( 5.6 , 16 , 17 ) 5.1 Serious Skin Rashes [see Boxed Warning] The risk of serious rash caused by treatment with lamotrigine extended-release tablet is not expected to differ from that with immediate-release lamotrigine [ see Boxed Warning ].

However, the relatively limited treatment experience with lamotrigine extended-release tablets makes it difficult to characterize the frequency and risk of serious rashes caused by treatment with lamotrigine extended-release tablets.

Pediatric Population The incidence of serious rash associated with hospitalization and discontinuation of immediate-release lamotrigine in a prospectively followed cohort of pediatric patients (aged 2 to 16 years) with epilepsy receiving adjunctive therapy with immediate-release lamotrigine was approximately 0.8% (16 of 1,983).

When 14 of these cases were reviewed by 3 expert dermatologists, there was considerable disagreement as to their proper classification.

To illustrate, one dermatologist considered none of the cases to be Stevens-Johnson syndrome; another assigned 7 of the 14 to this diagnosis.

There was 1 rash-related death in this 1,983-patient cohort.

Additionally, there have been rare cases of toxic epidermal necrolysis with and without permanent sequelae and/or death in US and foreign postmarketing experience.

There is evidence that the inclusion of valproate in a multidrug regimen increases the risk of serious, potentially life-threatening rash in pediatric patients.

In pediatric patients who used valproate concomitantly, 1.2% (6 of 482) experienced a serious rash compared with 0.6% (6 of 952) patients not taking valproate.

Lamotrigine extended-release tablet is not approved in patients younger than 13 years.

Adult Population Serious rash associated with hospitalization and discontinuation of immediate-release lamotrigine occurred in 0.3% (11 of 3,348) of adult patients who received immediate-release lamotrigine in premarketing clinical trials of epilepsy.

In worldwide postmarketing experience, rare cases of rash-related death have been reported, but their numbers are too few to permit a precise estimate of the rate.

Among the rashes leading to hospitalization were Stevens-Johnson syndrome, toxic epidermal necrolysis, angioedema, and those associated with multiorgan hypersensitivity [ see Warnings and Precautions (5.2) ].

There is evidence that the inclusion of valproate in a multidrug regimen increases the risk of serious, potentially life-threatening rash in adults.

Specifically, of 584 patients administered immediate-release lamotrigine with valproate in epilepsy clinical trials, 6 (1%) were hospitalized in association with rash; in contrast, 4 (0.16%) of 2,398 clinical trial patients and volunteers administered immediate-release lamotrigine in the absence of valproate were hospitalized.

Patients With History of Allergy or Rash to Other Antiepileptic Drugs The risk of nonserious rash may be increased when the recommended initial dose and/or the rate of dose escalation for lamotrigine extended-release tablets are exceeded and in patients with a history of allergy or rash to other AEDs.

5.2 Multiorgan Hypersensitivity Reactions and Organ Failure Multiorgan hypersensitivity reactions, also known as drug reaction with eosinophilia and systemic symptoms (DRESS), have occurred with lamotrigine.

Some have been fatal or life threatening.

DRESS typically, although not exclusively, presents with fever, rash, and/or lymphadenopathy in association with other organ system involvement, such as hepatitis, nephritis, hematologic abnormalities, myocarditis, or myositis, sometimes resembling an acute viral infection.

Eosinophilia is often present.

This disorder is variable in its expression and other organ systems not noted here may be involved.

Fatalities associated with acute multiorgan failure and various degrees of hepatic failure have been reported in 2 of 3,796 adult patients and 4 of 2,435 pediatric patients who received lamotrigine in epilepsy clinical trials.

Rare fatalities from multiorgan failure have also been reported in postmarketing use.

Isolated liver failure without rash or involvement of other organs has also been reported with lamotrigine.

It is important to note that early manifestations of hypersensitivity (e.g., fever, lymphadenopathy) may be present even though a rash is not evident.

If such signs or symptoms are present, the patient should be evaluated immediately.

Lamotrigine extended-release tablets should be discontinued if an alternative etiology for the signs or symptoms cannot be established.

Prior to initiation of treatment with lamotrigine extended-release tablets, the patient should be instructed that a rash or other signs or symptoms of hypersensitivity (e.g., fever, lymphadenopathy) may herald a serious medical event and that the patient should report any such occurrence to a physician immediately.

5.3 Blood Dyscrasias There have been reports of blood dyscrasias with immediate-release lamotrigine that may or may not be associated with multiorgan hypersensitivity (also known as DRESS) [ see Warnings and Precautions (5.2) ].

These have included neutropenia, leukopenia, anemia, thrombocytopenia, pancytopenia, and, rarely, aplastic anemia and pure red cell aplasia.

5.4 Suicidal Behavior and Ideation AEDs, including lamotrigine extended-release tablets, increase the risk of suicidal thoughts or behavior in patients taking these drugs for any indication.

Patients treated with any AED for any indication should be monitored for the emergence or worsening of depression, suicidal thoughts or behavior, and/or any unusual changes in mood or behavior.

Pooled analyses of 199 placebo-controlled clinical trials of 11 different AEDs showed that patients randomized to 1 of the AEDs had approximately twice the risk (adjusted Relative Risk 1.8, 95% CI: 1.2, 2.7) of suicidal thinking or behavior compared with patients randomized to placebo.

In these trials, which had a median treatment duration of 12 weeks, the estimated incidence of suicidal behavior or ideation among 27,863 AED-treated patients was 0.43%, compared with 0.24% among 16,029 placebo-treated patients, representing an increase of approximately 1 case of suicidal thinking or behavior for every 530 patients treated.

There were 4 suicides in drug-treated patients in the trials and none in placebo-treated patients, but the number of events is too small to allow any conclusion about drug effect on suicide.

The increased risk of suicidal thoughts or behavior with AEDs was observed as early as 1 week after starting treatment with AEDs and persisted for the duration of treatment assessed.

Because most trials included in the analysis did not extend beyond 24 weeks, the risk of suicidal thoughts or behavior beyond 24 weeks could not be assessed.

The risk of suicidal thoughts or behavior was generally consistent among drugs in the data analyzed.

The finding of increased risk with AEDs of varying mechanism of action and across a range of indications suggests that the risk applies to all AEDs used for any indication.

The risk did not vary substantially by age (5 to 100 years) in the clinical trials analyzed.

Table 3 shows absolute and relative risk by indication for all evaluated AEDs.

Table 3.

Risk by Indication for Antiepileptic Drugs in the Pooled Analysis Indication Placebo Patients With Events per 1 , 000 Patients Drug Patients With Events per 1 , 000 Patients Relative Risk : Incidence of Events in Drug Patients / Incidence in Placebo Patients Risk Difference : Additional Drug Patients With Events per 1 , 000 Patients Epilepsy 1 3.4 3.5 2.4 Psychiatric 5.7 8.5 1.5 2.9 Other 1 1.8 1.9 0.9 Total 2.4 4.3 1.8 1.9 The relative risk for suicidal thoughts or behavior was higher in clinical trials for epilepsy than in clinical trials for psychiatric or other conditions, but the absolute risk differences were similar for the epilepsy and psychiatric indications.

Anyone considering prescribing lamotrigine extended-release tablets or any other AED must balance the risk of suicidal thoughts or behavior with the risk of untreated illness.

Epilepsy and many other illnesses for which AEDs are prescribed are themselves associated with morbidity and mortality and an increased risk of suicidal thoughts and behavior.

Should suicidal thoughts and behavior emerge during treatment, the prescriber needs to consider whether the emergence of these symptoms in any given patient may be related to the illness being treated.

Patients, their caregivers, and families should be informed that AEDs increase the risk of suicidal thoughts and behavior and should be advised of the need to be alert for the emergence or worsening of the signs and symptoms of depression, any unusual changes in mood or behavior, the emergence of suicidal thoughts or suicidal behavior, or thoughts about self-harm.

Behaviors of concern should be reported immediately to healthcare providers.

5.5 Aseptic Meningitis Therapy with lamotrigine increases the risk of developing aseptic meningitis.

Because of the potential for serious outcomes of untreated meningitis due to other causes, patients should also be evaluated for other causes of meningitis and treated as appropriate.

Postmarketing cases of aseptic meningitis have been reported in pediatric and adult patients taking lamotrigine for various indications.

Symptoms upon presentation have included headache, fever, nausea, vomiting, and nuchal rigidity.

Rash, photophobia, myalgia, chills, altered consciousness, and somnolence were also noted in some cases.

Symptoms have been reported to occur within 1 day to one and a half months following the initiation of treatment.

In most cases, symptoms were reported to resolve after discontinuation of lamotrigine.

Re-exposure resulted in a rapid return of symptoms (from within 30 minutes to 1 day following re-initiation of treatment) that were frequently more severe.

Some of the patients treated with lamotrigine who developed aseptic meningitis had underlying diagnoses of systemic lupus erythematosus or other autoimmune diseases.

Cerebrospinal fluid (CSF) analyzed at the time of clinical presentation in reported cases was characterized by a mild to moderate pleocytosis, normal glucose levels, and mild to moderate increase in protein.

CSF white blood cell count differentials showed a predominance of neutrophils in a majority of the cases, although a predominance of lymphocytes was reported in approximately one third of the cases.

Some patients also had new onset of signs and symptoms of involvement of other organs (predominantly hepatic and renal involvement), which may suggest that in these cases the aseptic meningitis observed was part of a hypersensitivity reaction [ see Warnings and Precautions (5.2) ].

5.6 Potential Medication Errors Medication errors involving lamotrigine have occurred.

In particular, the names lamotrigine can be confused with the names of other commonly used medications.

Medication errors may also occur between the different formulations of lamotrigine.

To reduce the potential of medication errors, write and say lamotrigine extended-release tablets clearly.

Depictions of the lamotrigine extended-release tablets can be found in the Medication Guide.

Each lamotrigine extended-release tablet has a distinct debossing and is debossed with “W” on one side and “271” on the other side for 25 mg, “W” on one side and “274” on the other side for 50 mg, “W” on one side and “273” on the other side for 100 mg, “W” on one side and “272” on the other side for 200 mg, and “W” on one side and “275” on the other side for 300 mg.

These distinctive features serve to identify the different presentations of the drug and thus may help reduce the risk of medication errors.

Lamotrigine extended-release tablets are supplied in circular, unit-of-use bottles containing 30 tablets and 100 unit dose blister pack.

Additionally, Lamotrigine extended-release tablets are also supplied as 500 count bottle pack.

The label on the bottle includes a depiction of the tablets that further communicates to patients and pharmacists that the medication is lamotrigine extended-release tablets and the specific tablet strength included in the bottle.

To avoid the medication error of using the wrong drug or formulation, patients should be strongly advised to visually inspect their tablets to verify that they are lamotrigine extended-release tablets each time they fill their prescription.

5.7 Concomitant Use With Oral Contraceptives Some estrogen-containing oral contraceptives have been shown to decrease serum concentrations of lamotrigine [ see Clinical Pharmacology (12.3) ].

Dosage adjustments will be necessary in most patients who start or stop estrogen-containing oral contraceptives while taking lamotrigine extended-release tablets [ see Dosage and Administration (2.1) ].

During the week of inactive hormone preparation (pill-free week) of oral contraceptive therapy, plasma lamotrigine levels are expected to rise, as much as doubling at the end of the week.

Adverse reactions consistent with elevated levels of lamotrigine, such as dizziness, ataxia, and diplopia, could occur.

5.8 Withdrawal Seizures As with other AEDs, lamotrigine extended-release tablets should not be abruptly discontinued.

In patients with epilepsy there is a possibility of increasing seizure frequency.

Unless safety concerns require a more rapid withdrawal, the dose of lamotrigine extended-release tablets should be tapered over a period of at least 2 weeks (approximately 50% reduction per week) [ see Dosage and Administration (2.1) ].

5.9 Status Epilepticus Valid estimates of the incidence of treatment-emergent status epilepticus among patients treated with immediate-release lamotrigine are difficult to obtain because reporters participating in clinical trials did not all employ identical rules for identifying cases.

At a minimum, 7 of 2,343 adult patients had episodes that could unequivocally be described as status epilepticus.

In addition, a number of reports of variably defined episodes of seizure exacerbation (e.g., seizure clusters, seizure flurries) were made.

5.10 Sudden Unexplained Death in Epilepsy (SUDEP) During the premarketing development of immediate-release lamotrigine, 20 sudden and unexplained deaths were recorded among a cohort of 4,700 patients with epilepsy (5,747 patient-years of exposure).

Some of these could represent seizure-related deaths in which the seizure was not observed, e.g., at night.

This represents an incidence of 0.0035 deaths per patient-year.

Although this rate exceeds that expected in a healthy population matched for age and sex, it is within the range of estimates for the incidence of sudden unexplained death in epilepsy (SUDEP) in patients not receiving lamotrigine (ranging from 0.0005 for the general population of patients with epilepsy, to 0.004 for a recently studied clinical trial population similar to that in the clinical development program for immediate-release lamotrigine, to 0.005 for patients with refractory epilepsy).

Consequently, whether these figures are reassuring or suggest concern depends on the comparability of the populations reported upon with the cohort receiving immediate-release lamotrigine and the accuracy of the estimates provided.

Probably most reassuring is the similarity of estimated SUDEP rates in patients receiving immediate-release lamotrigine and those receiving other AEDs, chemically unrelated to each other, that underwent clinical testing in similar populations.

Importantly, that drug is chemically unrelated to lamotrigine.

This evidence suggests, although it certainly does not prove, that the high SUDEP rates reflect population rates, not a drug effect.

5.11 Addition of Lamotrigine Extended-Release Tablets to a Multidrug Regimen That Includes Valproate Because valproate reduces the clearance of lamotrigine, the dosage of lamotrigine in the presence of valproate is less than half of that required in its absence [ see Dosage and Administration ( 2.1 , 2.2 ), Drug Interactions (7) ].

5.12 Binding in the Eye and Other Melanin-Containing Tissues Because lamotrigine binds to melanin, it could accumulate in melanin-rich tissues over time.

This raises the possibility that lamotrigine may cause toxicity in these tissues after extended use.

Although ophthalmological testing was performed in 1 controlled clinical trial, the testing was inadequate to exclude subtle effects or injury occurring after long-term exposure.

Moreover, the capacity of available tests to detect potentially adverse consequences, if any, of lamotrigine’s binding to melanin is unknown.

Accordingly, although there are no specific recommendations for periodic ophthalmological monitoring, prescribers should be aware of the possibility of long-term ophthalmologic effects.

5.13 Laboratory Tests False-Positive Drug Test Results Lamotrigine has been reported to interfere with the assay used in some rapid urine drug screens, which can result in false-positive readings, particularly for phencyclidine (PCP).

A more specific analytical method should be used to confirm a positive result.

Plasma Concentrations of Lamotrigine The value of monitoring plasma concentrations of lamotrigine in patients treated with lamotrigine extended-release tablets has not been established.

Because of the possible pharmacokinetic interactions between lamotrigine and other drugs, including AEDs (see Table 6), monitoring of the plasma levels of lamotrigine and concomitant drugs may be indicated, particularly during dosage adjustments.

In general, clinical judgment should be exercised regarding monitoring of plasma levels of lamotrigine and other drugs and whether or not dosage adjustments are necessary.

Effect on Leukocytes Treatment with lamotrigine extended-release tablets caused an increased incidence of subnormal (below the reference range) values in some hematology analytes (e.g., total white blood cells, monocytes).

The treatment effect (Lamotrigine extended-release tablets % – Placebo %) incidence of subnormal counts was 3% for total white blood cells and 4% for monocytes.

INFORMATION FOR PATIENTS

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Medication Guide).

Rash Prior to initiation of treatment with lamotrigine extended-release tablets, inform patients that a rash or other signs or symptoms of hypersensitivity (e.g., fever, lymphadenopathy) may herald a serious medical event and instruct them to report any such occurrence to their physician immediately.

Multiorgan Hypersensitivity Reactions, Blood Dyscrasias, and Organ Failure Inform patients that multiorgan hypersensitivity reactions and acute multiorgan failure may occur with lamotrigine.

Isolated organ failure or isolated blood dyscrasias without evidence of multiorgan hypersensitivity may also occur.

Instruct patients to contact their physician immediately if they experience any signs or symptoms of these conditions [ see Warnings and Precautions ( 5.2 , 5.3 ) ].

Suicidal Thinking and Behavior Inform patients, their caregivers, and families that AEDs, including lamotrigine extended-release tablets, may increase the risk of suicidal thoughts and behavior.

Instruct them to be alert for the emergence or worsening of symptoms of depression, any unusual changes in mood or behavior, or the emergence of suicidal thoughts or behavior or thoughts about self-harm.

Instruct them to immediately report behaviors of concern to their physician.

Worsening of Seizures Advise patients to notify their physician if worsening of seizure control occurs.

Central Nervous System Adverse Effects Inform patients that lamotrigine extended-release tablets may cause dizziness, somnolence, and other symptoms and signs of central nervous system depression.

Accordingly, instruct them neither to drive a car nor to operate other complex machinery until they have gained sufficient experience on lamotrigine extended-release tablets to gauge whether or not it adversely affects their mental and/or motor performance.

Pregnancy and Nursing Instruct patients to notify their physician if they become pregnant or intend to become pregnant during therapy and if they intend to breastfeed or are breastfeeding an infant.

Encourage patients to enroll in the NAAED Pregnancy Registry if they become pregnant.

This registry is collecting information about the safety of antiepileptic drugs during pregnancy.

To enroll, patients can call the toll-free number 1-888-233-2334 [ see Use in Specific Populations (8.1) ].

Inform patients who intend to breastfeed that lamotrigine extended-release tablet is present in breast milk and advise them to monitor their child for potential adverse effects of this drug.

Discuss the benefits and risks of continuing breastfeeding.

Oral Contraceptive Use Instruct women to notify their physician if they plan to start or stop use of oral contraceptives or other female hormonal preparations.

Starting estrogen-containing oral contraceptives may significantly decrease lamotrigine plasma levels and stopping estrogen-containing oral contraceptives (including the pill-free week) may significantly increase lamotrigine plasma levels [ see Warnings and Precautions (5.7) , Clinical Pharmacology (12.3) ].

Also instruct women to promptly notify their physician if they experience adverse reactions or changes in menstrual pattern (e.g., break-through bleeding) while receiving lamotrigine extended-release tablets in combination with these medications.

Discontinuing Lamotrigine Extended-Release Tablets Instruct patients to notify their physician if they stop taking lamotrigine extended-release tablets for any reason and not to resume lamotrigine extended-release tablets without consulting their physician.

Aseptic Meningitis Inform patients that lamotrigine extended-release tablets may cause aseptic meningitis.

Instruct them to notify their physician immediately if they develop signs and symptoms of meningitis such as headache, fever, nausea, vomiting, stiff neck, rash, abnormal sensitivity to light, myalgia, chills, confusion, or drowsiness while taking lamotrigine extended-release tablets.

Potential Medication Errors To avoid a medication error of using the wrong drug or formulation, strongly advise patients to visually inspect their tablets to verify that they are lamotrigine extended-release tablets each time they fill their prescription [ see Dosage Forms and Strengths (3) , How Supplied/Storage and Handling (16) ].

Refer the patient to the Medication Guide that provides depictions of the lamotrigine extended-release tablets extended-release tablets.

Manufactured by: Wockhardt Limited H-14/2, M.I.D.C.

Area, Waluj, Aurangabad, Maharashtra, India.

Distributed by: Wockhardt USA LLC.

20 Waterview Blvd.

Parsippany, NJ 07054 USA.

Rev.020715

DOSAGE AND ADMINISTRATION

2 Do not exceed the recommended initial dosage and subsequent dose escalation.

( 2.1 ) Initiation of adjunctive therapy and conversion to monotherapy requires slow titration dependent on concomitant AEDs; the prescriber must refer to the appropriate algorithm in Dosage and Administration.

( 2.2 , 2.3 ) Adjunctive therapy: Target therapeutic dosage range is 200 to 600 mg daily and is dependent on concomitant AEDs.

( 2.2 ) Conversion to monotherapy: Target therapeutic dosage range is 250 to 300 mg daily.

( 2.3 ) Conversion from immediate-release lamotrigine to lamotrigine extended-release tablets: The initial dose of lamotrigine extended-release tablets should match the total daily dose of the immediate-release lamotrigine.

Patients should be closely monitored for seizure control after conversion.

( 2.4 ) Do not restart lamotrigine extended-release tablets in patients who discontinued due to rash unless the potential benefits clearly outweigh the risks.

( 2.1 , 5.1 ) Adjustments to maintenance doses will be necessary in most patients starting or stopping estrogen-containing oral contraceptives.

( 2.1 , 5.7 ) Discontinuation: Taper over a period of at least 2 weeks (approximately 50% dose reduction per week).

( 2.1 , 5.8 ) Lamotrigine extended-release tablets are taken once daily, with or without food.

Tablets must be swallowed whole and must not be chewed, crushed, or divided.

2.1 General Dosing Considerations Rash There are suggestions, yet to be proven, that the risk of severe, potentially life-threatening rash may be increased by (1) coadministration of lamotrigine extended-release tablets with valproate, (2) exceeding the recommended initial dose of lamotrigine extended-release tablets, or (3) exceeding the recommended dose escalation for lamotrigine extended-release tablets.

However, cases have occurred in the absence of these factors [ see Boxed Warning ].

Therefore, it is important that the dosing recommendations be followed closely.

The risk of nonserious rash may be increased when the recommended initial dose and/or the rate of dose escalation for lamotrigine extended-release tablet is exceeded and in patients with a history of allergy or rash to other AEDs.

It is recommended that lamotrigine extended-release tablets not be restarted in patients who discontinued due to rash associated with prior treatment with lamotrigine unless the potential benefits clearly outweigh the risks.

If the decision is made to restart a patient who has discontinued lamotrigine extended-release tablets, the need to restart with the initial dosing recommendations should be assessed.

The greater the interval of time since the previous dose, the greater consideration should be given to restarting with the initial dosing recommendations.

If a patient has discontinued lamotrigine for a period of more than 5 half-lives, it is recommended that initial dosing recommendations and guidelines be followed.

The half-life of lamotrigine is affected by other concomitant medications [ see Clinical Pharmacology (12.3) ].

Lamotrigine Extended-Release Tablets Added to Drugs Known to Induce or Inhibit Glucuronidation Because lamotrigine is metabolized predominantly by glucuronic acid conjugation, drugs that are known to induce or inhibit glucuronidation may affect the apparent clearance of lamotrigine.

Drugs that induce glucuronidation include carbamazepine, phenytoin, phenobarbital, primidone, rifampin, estrogen-containing oral contraceptives, and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir.

Valproate inhibits glucuronidation.

For dosing considerations for lamotrigine extended-release tablets in patients on estrogen-containing contraceptives and atazanavir/ritonavir, see below and Table 5.

For dosing considerations for lamotrigine extended-release tablets in patients on other drugs known to induce or inhibit glucuronidation, see Table 1 and Table 5.

Target Plasma Levels A therapeutic plasma concentration range has not been established for lamotrigine.

Dosing of lamotrigine extended-release tablets should be based on therapeutic response [ see Clinical Pharmacology (12.3) ].

Women Taking Estrogen-Containing Oral Contraceptives Starting lamotrigine extended-release tablets in Women Taking Estrogen-Containing Oral Contraceptives : Although estrogen-containing oral contraceptives have been shown to increase the clearance of lamotrigine [ see Clinical Pharmacology (12.3) ], no adjustments to the recommended dose-escalation guidelines for lamotrigine extended-release tablets should be necessary solely based on the use of estrogen-containing oral contraceptives.

Therefore, dose escalation should follow the recommended guidelines for initiating adjunctive therapy with lamotrigine extended-release tablets based on the concomitant AED or other concomitant medications (see Table 1).

See below for adjustments to maintenance doses of lamotrigine extended-release tablets in women taking estrogen-containing oral contraceptives.

Adjustments to the Maintenance Dose of lamotrigine extended-release tablets in Women Taking Estrogen-Containing Oral Contraceptives: (1) Taking Estrogen-Containing Oral Contraceptives : In women not taking carbamazepine, phenytoin, phenobarbital, primidone, or other drugs such as rifampin and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir that induce lamotrigine glucuronidation [ see Drug Interactions (7) , Clinical Pharmacology (12.3) ], the maintenance dose of lamotrigine extended-release tablets will in most cases need to be increased by as much as 2-fold over the recommended target maintenance dose to maintain a consistent lamotrigine plasma level.

(2) Starting Estrogen-Containing Oral Contraceptives : In women taking a stable dose of lamotrigine extended-release tablets and not taking carbamazepine, phenytoin, phenobarbital, primidone, or other drugs such as rifampin and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir that induce lamotrigine glucuronidation [ see Drug Interactions (7) , Clinical Pharmacology (12.3) ], the maintenance dose will in most cases need to be increased by as much as 2-fold to maintain a consistent lamotrigine plasma level.

The dose increases should begin at the same time that the oral contraceptive is introduced and continue, based on clinical response, no more rapidly than 50 to 100 mg/day every week.

Dose increases should not exceed the recommended rate (see Table 1) unless lamotrigine plasma levels or clinical response support larger increases.

Gradual transient increases in lamotrigine plasma levels may occur during the week of inactive hormonal preparation (pill-free week), and these increases will be greater if dose increases are made in the days before or during the week of inactive hormonal preparation.

Increased lamotrigine plasma levels could result in additional adverse reactions, such as dizziness, ataxia, and diplopia.

If adverse reactions attributable to lamotrigine extended-release tablets consistently occur during the pill-free week, dose adjustments to the overall maintenance dose may be necessary.

Dose adjustments limited to the pill-free week are not recommended.

For women taking lamotrigine extended-release tablets in addition to carbamazepine, phenytoin, phenobarbital, primidone, or other drugs such as rifampin and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir that induce lamotrigine glucuronidation [ see Drug Interactions (7) , Clinical Pharmacology (12.3) ], no adjustment to the dose of lamotrigine extended-release tablets should be necessary.

(3) Stopping Estrogen-Containing Oral Contraceptives : In women not taking carbamazepine, phenytoin, phenobarbital, primidone, or other drugs such as rifampin and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir that induce lamotrigine glucuronidation [ see Drug Interactions (7) , Clinical Pharmacology (12.3) ], the maintenance dose of lamotrigine extended-release tablets will in most cases need to be decreased by as much as 50% in order to maintain a consistent lamotrigine plasma level.

The decrease in dose of lamotrigine extended-release tablets should not exceed 25% of the total daily dose per week over a 2-week period, unless clinical response or lamotrigine plasma levels indicate otherwise [ see Clinical Pharmacology (12.3) ].

In women taking lamotrigine extended-release tablets in addition to carbamazepine, phenytoin, phenobarbital, primidone, or other drugs such as rifampin and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir that induce lamotrigine glucuronidation [ see Drug Interactions (7) , Clinical Pharmacology (12.3) ], no adjustment to the dose of lamotrigine extended-release tablets should be necessary.

Women and Other Hormonal Contraceptive Preparations or Hormone Replacement Therapy The effect of other hormonal contraceptive preparations or hormone replacement therapy on the pharmacokinetics of lamotrigine has not been systematically evaluated.

It has been reported that ethinylestradiol, not progestogens, increased the clearance of lamotrigine up to 2-fold, and the progestin-only pills had no effect on lamotrigine plasma levels.

Therefore, adjustments to the dosage of lamotrigine extended-release tablets in the presence of progestogens alone will likely not be needed.

Patients Taking Atazanavir/Ritonavir While atazanavir/ritonavir does reduce the lamotrigine plasma concentration, no adjustments to the recommended dose-escalation guidelines for lamotrigine extended-release tablets should be necessary solely based on the use of atazanavir/ritonavir.

Dose escalation should follow the recommended guidelines for initiating adjunctive therapy with lamotrigine extended-release tablets based on concomitant AED or other concomitant medications (see Tables 1 and 5).

In patients already taking maintenance doses of lamotrigine extended-release tablets and not taking glucuronidation inducers, the dose of lamotrigine extended-release tablets may need to be increased if atazanavir/ritonavir is added, or decreased if atazanavir/ritonavir is discontinued [ see Clinical Pharmacology (12.3) ].

Patients With Hepatic Impairment Experience in patients with hepatic impairment is limited.

Based on a clinical pharmacology study in 24 subjects with mild, moderate, and severe liver impairment [ see Use in Specific Populations (8.6) , Clinical Pharmacology (12.3) ], the following general recommendations can be made.

No dosage adjustment is needed in patients with mild liver impairment.

Initial, escalation, and maintenance doses should generally be reduced by approximately 25% in patients with moderate and severe liver impairment without ascites and 50% in patients with severe liver impairment with ascites.

Escalation and maintenance doses may be adjusted according to clinical response.

Patients With Renal Impairment Initial doses of lamotrigine extended-release tablets should be based on patients’ concomitant medications (see Table 1); reduced maintenance doses may be effective for patients with significant renal impairment [ see Use in Specific Populations (8.7) , Clinical Pharmacology (12.3) ].

Few patients with severe renal impairment have been evaluated during chronic treatment with immediate-release lamotrigine.

Because there is inadequate experience in this population, lamotrigine extended-release tablets should be used with caution in these patients.

Discontinuation Strategy For patients receiving lamotrigine extended-release tablets in combination with other AEDs, a re-evaluation of all AEDs in the regimen should be considered if a change in seizure control or an appearance or worsening of adverse reactions is observed.

If a decision is made to discontinue therapy with lamotrigine extended-release tablets, a step-wise reduction of dose over at least 2 weeks (approximately 50% per week) is recommended unless safety concerns require a more rapid withdrawal [ see Warnings and Precautions (5.8) ].

Discontinuing carbamazepine, phenytoin, phenobarbital, primidone, or other drugs such as rifampin and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir that induce lamotrigine glucuronidation should prolong the half-life of lamotrigine; discontinuing valproate should shorten the half-life of lamotrigine.

2.2 Adjunctive Therapy for Primary Generalized Tonic-Clonic and Partial-Onset Seizures This section provides specific dosing recommendations for patients aged 13 years and older.

Specific dosing recommendations are provided depending upon concomitant AEDs or other concomitant medications.

Table 1.

Escalation Regimen for Lamotrigine Extended-Release Tablets in Patients Aged 13 Years and Older a Valproate has been shown to inhibit glucuronidation and decrease the apparent clearance of lamotrigine [ see Drug Interactions (7) , Clinical Pharmacology (12.3) ].

b Drugs that induce lamotrigine glucuronidation and increase clearance, other than the specified antiepileptic drugs, include estrogen-containing oral contraceptives, rifampin, and the protease inhibitors lopinavir/ritonavir and atazanavir/ritonavir.

Dosing recommendations for oral contraceptives and the protease inhibitor atazanavir/ritonavir can be found in General Dosing Considerations [ see Dosage and Administration (2.1) ].

Patients on rifampin and the protease inhibitor lopinavir/ritonavir should follow the same dosing titration/maintenance regimen used with antiepileptic drugs that induce glucuronidation and increase clearance [ see Dosage and Administration (2.1) , Drug Interactions (7) , and Clinical Pharmacology (12.3) ].

c Dose increases at week 8 or later should not exceed 100 mg daily at weekly intervals.

In Patients TAKING Valproate a In Patients NOT TAKING Carbamazepine , Phenytoin , Phenobarbital , Primidone , b or Valproate a In Patients TAKING Carbamazepine , Phenytoin , Phenobarbital , or Primidone b and NOT TAKING Valproate a Weeks 1 and 2 25 mg every other day 25 mg every day 50 mg every day Weeks 3 and 4 25 mg every day 50 mg every day 100 mg every day Week 5 50 mg every day 100 mg every day 200 mg every day Week 6 100 mg every day 150 mg every day 300 mg every day Week 7 150 mg every day 200 mg every day 400 mg every day Maintenance range (week 8 and onward) 200 to 250 mg every day c 300 to 400 mg every day c 400 to 600 mg every day c 2.3 Conversion From Adjunctive Therapy to Monotherapy The goal of the transition regimen is to attempt to maintain seizure control while mitigating the risk of serious rash associated with the rapid titration of lamotrigine extended-release tablets.

To avoid an increased risk of rash, the recommended maintenance dosage range of lamotrigine extended-release tablets as monotherapy is 250 to 300 mg given once daily.

The recommended initial dose and subsequent dose escalations for lamotrigine extended-release tablets should not be exceeded [ see Boxed Warning ].

Conversion From Adjunctive Therapy With Carbamazepine, Phenytoin, Phenobarbital, or Primidone to Monotherapy With Lamotrigine Extended-Release Tablets After achieving a dose of 500 mg/day of lamotrigine extended-release tablets using the guidelines in Table 1, the concomitant enzyme-inducing AED should be withdrawn by 20% decrements each week over a 4-week period.

Two weeks after completion of withdrawal of the enzyme-inducing AED, the dosage of lamotrigine extended-release tablets may be decreased no faster than 100 mg/day each week to achieve the monotherapy maintenance dosage range of 250 to 300 mg/day.

The regimen for the withdrawal of the concomitant AED is based on experience gained in the controlled monotherapy clinical trial using immediate-release lamotrigine.

Conversion From Adjunctive Therapy With Valproate to Monotherapy With Lamotrigine Extended-Release Tablets The conversion regimen involves the 4 steps outlined in Table 2.

Table 2.

Conversion From Adjunctive Therapy With Valproate to Monotherapy With Lamotrigine Extended-Release Tablets in Patients Aged 13 Years and Older With Epilepsy Lamotrigine Extended – Release Tablets Valproate Step 1 Achieve a dose of 150 mg/day according to guidelines in Table 1.

Maintain established stable dose.

Step 2 Maintain at 150 mg/day.

Decrease dose by decrements no greater than 500 mg/day/week to 500 mg/day and then maintain for 1 week.

Step 3 Increase to 200 mg/day.

Simultaneously decrease to 250 mg/day and maintain for 1 week.

Step 4 Increase to 250 or 300 mg/day.

Discontinue.

Conversion From Adjunctive Therapy With Antiepileptic Drugs Other Than Carbamazepine, Phenytoin, Phenobarbital, Primidone, or Valproate to Monotherapy With Lamotrigine Extended-Release Tablets After achieving a dosage of 250 to 300 mg/day of lamotrigine extended-release tablets using the guidelines in Table 1, the concomitant AED should be withdrawn by 20% decrements each week over a 4-week period.

No adjustment to the monotherapy dose of lamotrigine extended-release tablets is needed.

2.4 Conversion From Immediate-Release Lamotrigine Tablets to Lamotrigine Extended-Release Tablets Patients may be converted directly from immediate-release lamotrigine to lamotrigine extended-release tablets.

The initial dose of lamotrigine extended-release tablets should match the total daily dose of immediate-release lamotrigine.

However, some subjects on concomitant enzyme-inducing agents may have lower plasma levels of lamotrigine on conversion and should be monitored [ see Clinical Pharmacology (12.3) ].

Following conversion to lamotrigine extended-release tablets, all patients (but especially those on drugs that induce lamotrigine glucuronidation) should be closely monitored for seizure control [ see Drug Interactions (7) ].

Depending on the therapeutic response after conversion, the total daily dose may need to be adjusted within the recommended dosing instructions (Table 1).

brimonidine tartrate 0.2 % Ophthalmic Solution

DRUG INTERACTIONS

7 Antihypertensives/cardiac glycosides may lower blood pressure.

( 7.1 ) Use with CNS depressants may result in an additive or potentiating effect.

( 7.2 ) Tricyclic antidepressants may potentially blunt the hypotensive effect of systemic clonidine.

( 7.3 ) Monoamine oxidase inhibitors may result in increased hypotension.

( 7.4 ) 7.1 Antihypertensives/Cardiac Glycosides Because brimonidine tartrate ophthalmic solution may reduce blood pressure, caution in using drugs such as antihypertensives and/or cardiac glycosides with brimonidine tartrate ophthalmic solution is advised.

7.2 CNS Depressants Although specific drug interaction studies have not been conducted with brimonidine tartrate ophthalmic solution, the possibility of an additive or potentiating effect with CNS depressants (alcohol, barbiturates, opiates, sedatives, or anesthetics) should be considered.

7.3 Tricyclic Antidepressants Tricyclic antidepressants have been reported to blunt the hypotensive effect of systemic clonidine.

It is not known whether the concurrent use of these agents with brimonidine tartrate ophthalmic solution in humans can lead to resulting interference with the IOP lowering effect.

Caution is advised in patients taking tricyclic antidepressants which can affect the metabolism and uptake of circulating amines.

7.4 Monoamine Oxidase Inhibitors Monoamine oxidase (MAO) inhibitors may theoretically interfere with the metabolism of brimonidine and potentially result in an increased systemic side-effect such as hypotension.

Caution is advised in patients taking MAO inhibitors which can affect the metabolism and uptake of circulating amines.

OVERDOSAGE

10 Very limited information exists on accidental ingestion of brimonidine in adults; the only adverse reaction reported to date has been hypotension.

Symptoms of brimonidine overdose have been reported in neonates, infants, and children receiving brimonidine tartrate as part of medical treatment of congenital glaucoma or by accidental oral ingestion [ see Use In Specific Populations ( 8.4 ) ].

Treatment of an oral overdose includes supportive and symptomatic therapy; a patent airway should be maintained.

DESCRIPTION

11 Brimonidine tartrate ophthalmic solution 0.2%, sterile, is a relatively selective alpha-2 adrenergic receptor agonist (topical intraocular pressure lowering agent).

The structural formula of brimonidine tartrate is: 5-Bromo-6-(2-imidazolidinylideneamino) quinoxaline L-tartrate; MW= 442.24 In solution, brimonidine tartrate ophthalmic solution 0.2% has a clear, greenish-yellow color.

It has an osmolality of 280 to 330 mOsml/kg and a pH of 5.6 to 6.6.

Each mL of brimonidine tartrate ophthalmic solution contains the active ingredient brimonidine tartrate 0.2% (2 mg/mL) with the inactive ingredients benzalkonium chloride 0.005% (0.05 mg/mL) as a preservative; citric acid; polyvinyl alcohol; sodium chloride; sodium citrate; and water for injection.

Hydrochloric acid and/or sodium hydroxide may be added to adjust pH.

Structural Formula

CLINICAL STUDIES

14 Elevated IOP presents a major risk factor in glaucomatous field loss.

The higher the level of IOP, the greater the likelihood of optic nerve damage and visual field loss.

Brimonidine tartrate has the action of lowering intraocular pressure with minimal effect on cardiovascular and pulmonary parameters.

In comparative clinical studies with timolol 0.5%, lasting up to one year, the IOP lowering effect of brimonidine tartrate ophthalmic solution was approximately 4 to 6 mm Hg compared with approximately 6 mm Hg for timolol.

In these studies, both patient groups were dosed BID; however, due to the duration of action of brimonidine tartrate ophthalmic solution, it is recommended that brimonidine tartrate ophthalmic solution be dosed TID.

Eight percent of subjects were discontinued from studies due to inadequately controlled intraocular pressure, which in 30% of these patients occurred during the first month of therapy.

Approximately 20% were discontinued due to adverse experiences.

HOW SUPPLIED

16 /STORAGE AND HANDLING Brimonidine tartrate ophthalmic solution 0.2% is supplied sterile, in white opaque plastic dropper bottles as follows: 5 mL NDC 17478-715-10 10 mL NDC 17478-715-11 15 mL NDC 17478-715-12 Storage: Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].

GERIATRIC USE

8.5 Geriatric Use No overall differences in safety or effectiveness have been observed between elderly and other adult patients.

DOSAGE FORMS AND STRENGTHS

3 Solution containing 2 mg/mL brimonidine tartrate.

Solution containing 2 mg/mL brimonidine tartrate.

( 3 )

MECHANISM OF ACTION

12.1 Mechanism of Action Brimonidine tartrate ophthalmic solution 0.2% is a relatively selective alpha-2 adrenergic receptor agonist with a peak ocular hypotensive effect occurring at two hours post-dosing.

Fluorophotometric studies in animals and humans suggest that brimonidine tartrate has a dual mechanism of action by reducing aqueous humor production and increasing uveoscleral outflow.

INDICATIONS AND USAGE

1 Brimonidine tartrate ophthalmic solution 0.2% is indicated for lowering intraocular pressure (IOP) in patients with open-angle glaucoma or ocular hypertension.

The IOP lowering efficacy of brimonidine tartrate ophthalmic solution diminishes over time in some patients.

This loss of effect appears with a variable time of onset in each patient and should be closely monitored.

Brimonidine tartrate ophthalmic solution 0.2% is an alpha adrenergic agonist indicated for lowering intraocular pressure (IOP) in patients with open-angle glaucoma or ocular hypertension.

( 1 )

PEDIATRIC USE

8.4 Pediatric Use Brimonidine tartrate ophthalmic solution is contraindicated in children under the age of 2 years [ see Contraindications ( 4.1 ) ].

During postmarketing surveillance, apnea, bradycardia, coma, hypotension, hypothermia, hypotonia, lethargy, pallor, respiratory depression, and somnolence have been reported in infants receiving brimonidine.

The safety and effectiveness of brimonidine tartrate have not been studied in children below the age of 2 years.

In a well-controlled clinical study conducted in pediatric glaucoma patients (ages 2 to 7 years) the most commonly observed adverse reactions with brimonidine tartrate ophthalmic solution 0.2% dosed three times daily were somnolence (50% to 83% in patients ages 2 to 6 years) and decreased alertness.

In pediatric patients 7 years of age (greater than 20 kg), somnolence appears to occur less frequently (25%).

Approximately 16% of patients on brimonidine tartrate ophthalmic solution 0.2% discontinued from the study due to somnolence.

PREGNANCY

8.1 Pregnancy Pregnancy Category B: Teratogenicity studies have been performed in animals.

Brimonidine tartrate was not teratogenic when given orally during gestation days 6 through 15 in rats and days 6 through 18 in rabbits.

The highest doses of brimonidine tartrate in rats (2.5 mg/kg/day) and rabbits (5 mg/kg/day) achieved AUC exposure values 375-fold higher or 19-fold higher, respectively, than similar values estimated in humans treated with brimonidine tartrate ophthalmic solution 0.2%, one drop in one eye, twice daily.

There are no adequate and well-controlled studies in pregnant women; however, in animal studies, brimonidine crossed the placenta and entered into the fetal circulation to a limited extent.

Because animal reproduction studies are not always predictive of human response, brimonidine tartrate ophthalmic solution should be used during pregnancy only if the potential benefit to the mother justifies the potential risk to the fetus.

NUSRING MOTHERS

8.3 Nursing Mothers It is not known whether brimonidine tartrate is excreted in human milk, although in animal studies, brimonidine tartrate has been shown to be excreted in breast milk.

Because of the potential for serious adverse reactions from brimonidine tartrate ophthalmic solution in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

WARNING AND CAUTIONS

5 WARNINGS AND PRECAUTIONS Potentiation of vascular insufficiency.

( 5.1 ) 5.1 Potentiation of Vascular Insufficiency Brimonidine tartrate ophthalmic solution may potentiate syndromes associated with vascular insufficiency.

Brimonidine tartrate ophthalmic solution should be used with caution in patients with depression, cerebral or coronary insufficiency, Raynaud’s phenomenon, orthostatic hypotension, or thromboangiitis obliterans.

5.2 Severe Cardiovascular Disease Although brimonidine tartrate ophthalmic solution had minimal effect on the blood pressure of patients in clinical studies, caution should be exercised in treating patients with severe cardiovascular disease.

5.3 Contamination of Topical Ophthalmic Products After Use There have been reports of bacterial keratitis associated with the use of multiple-dose containers of topical ophthalmic products.

These containers had been inadvertently contaminated by patients who, in most cases, had a concurrent corneal disease or a disruption of the ocular epithelial surface [ see Patient Counseling Information ( 17 ) ].

5.4 Use with Contact Lenses The preservative in brimonidine tartrate ophthalmic solution, benzalkonium chloride, may be absorbed by soft contact lenses.

Patients wearing soft contact lenses should be instructed to wait at least 15 minutes after instilling brimonidine tartrate ophthalmic solution to insert soft contact lenses.

INFORMATION FOR PATIENTS

17 PATIENT COUNSELING INFORMATION Handling the Container Instruct patients that ocular solutions, if handled improperly or if the tip of the dispensing container contacts the eye or surrounding structures, can become contaminated by common bacteria known to cause ocular infections.

Serious damage to the eye and subsequent loss of vision may result from using contaminated solutions [ see Warnings and Precautions ( 5.3 ) ].

Always replace the cap after using.

If solution changes color or becomes cloudy, do not use.

Do not use the product after the expiration date marked on the bottle.

When to Seek Physician Advice Advise patients that if they have ocular surgery or develop an intercurrent ocular condition (e.g., trauma or infection), they should immediately seek their physician’s advice concerning the continued use of the present multidose container.

Use with Contact Lenses Advise patients that contact lenses should be removed prior to instillation of brimonidine tartrate ophthalmic solution and may be reinserted 15 minutes following its administration.

Use with Other Ophthalmic Drugs Advise patients that if more than one topical ophthalmic drug is being used, the drugs should be administered at least five minutes apart.

Potential for Decreased Mental Alertness As with other similar medications, brimonidine tartrate ophthalmic solution may cause fatigue and/or drowsiness in some patients.

Caution patients who engage in hazardous activities of the potential for a decrease in mental alertness.

AKORN Distributed by: Akorn Operating Company LLC Gurnee, IL 60031 BT00N Rev.

05/22

DOSAGE AND ADMINISTRATION

2 The recommended dose is one drop of brimonidine tartrate ophthalmic solution 0.2% in the affected eye(s) three times daily, approximately 8 hours apart.

Brimonidine tartrate ophthalmic solution may be used concomitantly with other topical ophthalmic drug products to lower intraocular pressure.

If more than one topical ophthalmic product is to be used, the different products should be instilled at least 5 minutes apart.

One drop in the affected eye(s), three times daily, approximately 8 hours apart.

( 2 )

HCTZ 12.5 MG / valsartan 80 MG Oral Tablet

DRUG INTERACTIONS

7 Valsartan-Hydrochlorothiazide: Lithium: Increases in serum lithium concentrations and lithium toxicity have been reported during concomitant administration of lithium with angiotensin II receptor antagonists or thiazides.

Monitor lithium levels in patients taking valsartan and hydrochlorothiazide.

Valsartan: No clinically significant pharmacokinetic interactions were observed when valsartan was coadministered with amlodipine, atenolol, cimetidine, digoxin, furosemide, glyburide, hydrochlorothiazide or indomethacin.

The valsartan-atenolol combination was more antihypertensive than either component, but it did not lower the heart rate more than atenolol alone.

Coadministration of valsartan and warfarin did not change the pharmacokinetics of valsartan or the time-course of the anticoagulant properties of warfarin.

CYP 450 Interactions: In vitro metabolism studies indicate that CYP 450 mediated drug interactions between valsartan and coadministered drugs are unlikely because of the low extent of metabolism [see Clinical Pharmacology (12.3) ] .

Transporters: The results from an in vitro study with human liver tissue indicate that valsartan is a substrate of the hepatic uptake transporter OATP1B1 and the hepatic efflux transporter MRP2.

Coadministration of inhibitors of the uptake transporter (rifampin, cyclosporine) or efflux transporter (ritonavir) may increase the systemic exposure to valsartan.

Non-Steroidal Anti-Inflammatory Agents including Selective Cyclooxygenase-2 Inhibitors (COX-2 Inhibitors): In patients who are elderly, volume-depleted (including those on diuretic therapy), or with compromised renal function, coadministration of NSAIDs, including selective COX-2 inhibitors, with angiotensin II receptor antagonists, including valsartan, may result in deterioration of renal function, including possible acute renal failure.

These effects are usually reversible.

Monitor renal function periodically in patients receiving valsartan and NSAID therapy.

The antihypertensive effect of angiotensin II receptor antagonists, including valsartan may be attenuated by NSAIDs including selective COX-2 inhibitors.

Potassium : Concomitant use of valsartan with other agents that block the renin-angiotensin system, potassium sparing diuretics (e.g., spironolactone, triamterene, amiloride), potassium supplements, or salt substitutes containing potassium may lead to increases in serum potassium and in heart failure patients to increases in serum creatinine.

If co-medication is considered necessary, monitoring of serum potassium is advisable.

Dual Blockade of the Renin-Angiotensin System (RAS): Dual blockade of the RAS with angiotensin receptor blockers, ACE inhibitors or aliskiren is associated with increased risks of hypotension, hyperkalemia, and changes in renal function (including acute renal failure) compared to monotherapy.

Closely monitor blood pressure, renal function and electrolytes in patients on valsartan and hydrochlorothiazide and other agents that affect the RAS.

Do not coadminister aliskiren with valsartan and hydrochlorothiazide in patients with diabetes.

Avoid use of aliskiren with valsartan and hydrochlorothiazide in patients with renal impairment (GFR < 60 mL/min).

Hydrochlorothiazide: When administered concurrently, the following drugs may interact with thiazide diuretics: Antidiabetic Drugs (oral agents and insulin): Dosage adjustment of the antidiabetic drug may be required.

Nonsteroidal Anti-inflammatory Drugs (NSAIDS and COX-2 selective inhibitors): When valsartan and hydrochlorothiazide and non-steroidal anti-inflammatory agents are used concomitantly, the patient should be observed closely to determine if the desired effect of the diuretic is obtained.

Carbamazepine: May lead to symptomatic hyponatremia.

Ion exchange resins: Staggering the dosage of hydrochlorothiazide and ion exchange resins (e.g., cholestyramine, colestipol) such that hydrochlorothiazide is administered at least 4 hours before or 4 to 6 hours after the administration of resins would potentially minimize the interaction [see Clinical Pharmacology (12.3) ].

Cyclosporine: Concomitant treatment with cyclosporine may increase the risk of hyperuricemia and gout-type complications.

Antidiabetic drugs: Dosage adjustment of antidiabetic may be required.

( 7 ) Cholestyramine and colestipol: Reduced absorption of thiazides.

( 12.3 ) Lithium: Increased risk of lithium toxicity.

Monitor serum lithium concentrations during concurrent use.

( 7 ) Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): May increase risk of renal impairment.

Can reduce diuretic, natriuretic and antihypertensive effects of diuretics.

( 7 ) Dual inhibition of the renin-angiotesin system: Increased risk of renal impairment, hypotension and hyperkalemia.

( 7 )

OVERDOSAGE

10 Valsartan and Hydrochlorothiazide: Limited data are available related to overdosage in humans.

The most likely manifestations of overdosage would be hypotension and tachycardia; bradycardia could occur from parasympathetic (vagal) stimulation.

Depressed level of consciousness, circulatory collapse and shock have been reported.

If symptomatic hypotension should occur, supportive treatment should be instituted.

Valsartan is not removed from the plasma by dialysis.

The degree to which hydrochlorothiazide is removed by hemodialysis has not been established.

The most common signs and symptoms observed in patients are those caused by electrolyte depletion (hypokalemia, hypochloremia, hyponatremia) and dehydration resulting from excessive diuresis.

If digitalis has also been administered, hypokalemia may accentuate cardiac arrhythmias.

In rats and marmosets, single oral doses of valsartan up to 1524 and 762 mg/kg in combination with hydrochlorothiazide at doses up to 476 and 238 mg/kg, respectively, were very well tolerated without any treatment-related effects.

These no adverse effect doses in rats and marmosets, respectively, represent 46.5 and 23 times the maximum recommended human dose (MRHD) of valsartan and 188 and 113 times the MRHD of hydrochlorothiazide on a mg/m 2 basis.

(Calculations assume an oral dose of 320 mg/day valsartan in combination with 25 mg/day hydrochlorothiazide and a 60 kg patient.) Valsartan: Valsartan was without grossly observable adverse effects at single oral doses up to 2000 mg/kg in rats and up to 1000 mg/kg in marmosets, except for salivation and diarrhea in the rat and vomiting in the marmoset at the highest dose (60 and 31 times, respectively, the MRHD on a mg/m 2 basis).

(Calculations assume an oral dose of 320 mg/day and a 60 kg patient.) Hydrochlorothiazide: The oral LD 50 of hydrochlorothiazide is greater than 10 g/kg in both mice and rats, which represents 2,027 and 4,054 times, respectively, the MRHD on a mg/m 2 basis.

(Calculations assume an oral dose of 25 mg/day and a 60 kg patient.)

DESCRIPTION

11 Valsartan and hydrochlorothiazide tablets, USP is a combination of valsartan, an orally active, specific angiotensin II receptor blocker (ARB) acting on the AT 1 receptor subtype, and hydrochlorothiazide, a diuretic.

Valsartan, a nonpeptide molecule, is chemically described as N -[p-(o-1 H -Tetrazol-5-ylphenyl)benzyl- N -Valeryl-L-valine.

Its molecular formula is C 24 H 29 N 5 O 3 , its molecular weight is 435.5, and its structural formula is Valsartan, USP is a white to practically white fine powder.

It is soluble in ethanol and methanol and slightly soluble in water.

Hydrochlorothiazide, USP is a white, or practically white, practically odorless, crystalline powder.

It is slightly soluble in water; freely soluble in sodium hydroxide solution, in n -butylamine, and in dimethylformamide; sparingly soluble in methanol; and insoluble in ether, in chloroform, and in dilute mineral acids.

Hydrochlorothiazide is chemically described as 6-chloro-3,4-dihydro-2 H -1,2,4-benzothiadiazine-7-sulfonamide 1,1-dioxide.

Hydrochlorothiazide is a thiazide diuretic.

Its molecular formula is C 7 H 8 ClN 3 O 4 S 2 , its molecular weight is 297.73, and its structural formula is Valsartan and hydrochlorothiazide tablets are formulated for oral administration to contain valsartan and hydrochlorothiazide 80 mg/12.5 mg, 160 mg/12.5 mg, 160 mg/25 mg, 320 mg/12.5 mg and 320 mg/25 mg.

The inactive ingredients of the tablets are colloidal silicon dioxide, crospovidone, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, polydextrose, polyethylene glycol, povidone, pregelatinized starch (corn), sodium lauryl sulfate, titanium dioxide and triacetin.

The 80 mg/12.5 mg, 160 mg/12.5 mg, 160 mg/25 mg and 320 mg/12.5 mg tablets also contain red iron oxide and yellow iron oxide.

The 320 mg/25 mg tablet also contains FD&C Blue No.

2 Aluminum Lake and FD&C Yellow No.

6 Aluminum Lake.

Valsartan Structural Formula Hydrochlorothiazide Structural Formula

CLINICAL STUDIES

14 14.1 Hypertension Valsartan and Hydrochlorothiazide In controlled clinical trials including over 7,600 patients, 4,372 patients were exposed to valsartan (80 mg, 160 mg and 320 mg) and concomitant hydrochlorothiazide (12.5 mg and 25 mg).

Two factorial trials compared various combinations of 80 mg/12.5 mg, 80 mg/25 mg, 160 mg/12.5 mg, 160 mg/25 mg, 320 mg/12.5 mg and 320 mg/25 mg with their respective components and placebo.

The combination of valsartan and hydrochlorothiazide resulted in additive placebo-adjusted decreases in systolic and diastolic blood pressure at trough of 14 to 21/8 to 11 mmHg at 80 mg/12.5 mg to 320 mg/25 mg, compared to 7 to 10/4 to 5 mmHg for valsartan 80 mg to 320 mg and 5 to 11/2 to 5 mmHg for hydrochlorothiazide 12.5 mg to 25 mg, alone.

Three other controlled trials investigated the addition of hydrochlorothiazide to patients who did not respond adequately to valsartan 80 mg to valsartan 320 mg, resulted in the additional lowering of systolic and diastolic blood pressure by approximately 4 to 12/2 to 5 mmHg.

The maximal antihypertensive effect was attained 4 weeks after the initiation of therapy, the first time point at which blood pressure was measured in these trials.

In long-term follow-up studies (without placebo control) the effect of the combination of valsartan and hydrochlorothiazide appeared to be maintained for up to 2 years.

The antihypertensive effect is independent of age or gender.

The overall response to the combination was similar for Black and non-Black patients.

There was essentially no change in heart rate in patients treated with the combination of valsartan and hydrochlorothiazide in controlled trials.

There are no trials of the valsartan and hydrochlorothiazide combination tablet demonstrating reductions in cardiovascular risk in patients with hypertension, but the hydrochlorothiazide component and several ARBs, which are the same pharmacological class as the valsartan component, have demonstrated such benefits.

Valsartan The antihypertensive effects of valsartan were demonstrated principally in seven placebo-controlled, 4- to 12-week trials (one in patients over 65) of dosages from 10 to 320 mg/day in patients with baseline diastolic blood pressures of 95 to 115.

The studies allowed comparison of once daily and twice daily regimens of 160 mg/day; comparison of peak and trough effects; comparison (in pooled data) of response by gender, age and race; and evaluation of incremental effects of hydrochlorothiazide.

Administration of valsartan to patients with essential hypertension results in a significant reduction of sitting, supine, and standing systolic and diastolic blood pressure, usually with little or no orthostatic change.

In most patients, after administration of a single oral dose, onset of antihypertensive activity occurs at approximately 2 hours, and maximum reduction of blood pressure is achieved within 6 hours.

The antihypertensive effect persists for 24 hours after dosing, but there is a decrease from peak effect at lower doses (40 mg) presumably reflecting loss of inhibition of angiotensin II.

At higher doses, however (160 mg), there is little difference in peak and trough effect.

During repeated dosing, the reduction in blood pressure with any dose is substantially present within 2 weeks, and maximal reduction is generally attained after 4 weeks.

In long-term follow-up studies (without placebo control) the effect of valsartan appeared to be maintained for up to 2 years.

The antihypertensive effect is independent of age, gender or race.

The latter finding regarding race is based on pooled data and should be viewed with caution, because antihypertensive drugs that affect the renin-angiotensin system (that is, ACE inhibitors and angiotensin II blockers) have generally been found to be less effective in low-renin hypertensives (frequently Blacks) than in high-renin hypertensives (frequently Whites).

In pooled, randomized, controlled trials of valsartan that included a total of 140 Blacks and 830 Whites, valsartan and an ACE-inhibitor control were generally at least as effective in Blacks as Whites.

The explanation for this difference from previous findings is unclear.

Abrupt withdrawal of valsartan has not been associated with a rapid increase in blood pressure.

The seven studies of valsartan monotherapy included over 2,000 patients randomized to various doses of valsartan and about 800 patients randomized to placebo.

Doses below 80 mg were not consistently distinguished from those of placebo at trough, but doses of 80 mg, 160 mg and 320 mg produced dose related decreases in systolic and diastolic blood pressure, with the difference from placebo of approximately 6 to 9/3 to 5 mmHg at 80 mg to 160 mg and 9/6 mmHg at 320 mg.

Patients with an inadequate response to 80 mg once daily were titrated to either 160 mg once daily or 80 mg twice daily, which resulted in a comparable response in both groups.

In another 4-week study, 1,876 patients randomized to valsartan 320 mg once daily had an incremental blood pressure reduction 3/1 mmHg lower than did 1,900 patients randomized to valsartan 160 mg once daily.

In controlled trials, the antihypertensive effect of once daily valsartan 80 mg was similar to that of once daily enalapril 20 mg or once daily lisinopril 10 mg.

There was essentially no change in heart rate in valsartan-treated patients in controlled trials.

14.2 Initial Therapy – Hypertension The safety and efficacy of valsartan and hydrochlorothiazide as initial therapy for patients with severe hypertension (defined as a sitting diastolic blood pressure ≥ 110 mmHg and systolic blood pressure ≥ 140 mmHg off all antihypertensive therapy) was studied in a 6-week multicenter, randomized, double-blind study.

Patients were randomized to either valsartan and hydrochlorothiazide 160 mg/12.5 mg once daily or to valsartan (160 mg once daily) and followed for blood pressure response.

Patients were force-titrated at 2 week intervals.

Patients on combination therapy were subsequently titrated to 160 mg/25 mg followed by 320 mg/25 mg valsartan and hydrochlorothiazide.

Patients on monotherapy were subsequently titrated to 320 mg valsartan followed by a titration to 320 mg valsartan to maintain the blind.

The study randomized 608 patients, including 261 (43%) females, 147 (24%) Blacks and 75 (12%) ≥ 65 years of age.

The mean blood pressure at baseline for the total population was 168/112 mmHg.

The mean age was 52 years.

After 4 weeks of therapy, reductions in systolic and diastolic blood pressure were 9/5 mmHg greater in the group treated with valsartan and hydrochlorothiazide compared to valsartan.

Similar trends were seen when the patients were grouped according to gender, race or age.

HOW SUPPLIED

16 /STORAGE AND HANDLING Valsartan and Hydrochlorothiazide Tablets, USP are available containing 80 mg/12.5 mg, 160 mg/12.5 mg or 160 mg/25 mg of valsartan, USP and hydrochlorothiazide, USP The 80 mg/12.5 mg tablets are an orange film-coated, round, unscored tablets, debossed with M on one side of the tablet and V21 on the other side.

They are available as follows: NDC 51079-192-03 – Unit dose blister packages of 30 (3 cards of 10 tablets each).

The 160 mg/12.5 mg tablets are an orange film-coated, round, unscored tablets, debossed with M on one side of the tablet and V22 on the other side.

They are available as follows: NDC 51079-193-03 – Unit dose blister packages of 30 (3 cards of 10 tablets each).

The 160 mg/25 mg tablets are an orange film-coated, oval, unscored tablets, debossed with M on one side of the tablet and V23 on the other side.

They are available as follows: NDC 51079-194-03 – Unit dose blister packages of 30 (3 cards of 10 tablets each).

Store at 20° to 25°C (68° to 77°F).

[See USP Controlled Room Temperature.] Protect from light, moisture and heat.

PHARMACIST: Dispense the Patient Information Leaflet with each prescription.

GERIATRIC USE

8.5 Geriatric Use In the controlled clinical trials of valsartan and hydrochlorothiazide, 764 (17.5%) patients treated with valsartan and hydrochlorothiazide were ≥ 65 years and 118 (2.7%) were ≥ 75 years.

No overall difference in the efficacy or safety of valsartan and hydrochlorothiazide was observed between these patients and younger patients, but greater sensitivity of some older individuals cannot be ruled out.

DOSAGE FORMS AND STRENGTHS

3 80 mg/12.5 mg tablets, debossed with M on one side of the tablet and V21 on the other side.

160 mg/12.5 mg tablets, debossed with M on one side of the tablet and V22 on the other side.

160 mg/25 mg tablets, debossed with M on one side of the tablet and V23 on the other side.

320 mg/12.5 mg tablets, debossed with M on one side of the tablet and V24 on the other side.

320 mg/25 mg tablets, debossed with M on one side of the tablet and V25 on the other side.

Tablets (valsartan and HCTZ): 80 mg/12.5 mg, 160 mg/12.5 mg, 160 mg/25 mg, 320 mg/12.5 mg, 320 mg/25 mg ( 3 )

MECHANISM OF ACTION

12.1 Mechanism of Action Angiotensin II is formed from angiotensin I in a reaction catalyzed by angiotensin-converting enzyme (ACE, kininase II).

Angiotensin II is the principal pressor agent of the renin-angiotensin system, with effects that include vasoconstriction, stimulation of synthesis and release of aldosterone, cardiac stimulation, and renal reabsorption of sodium.

Valsartan blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II by selectively blocking the binding of angiotensin II to the AT 1 receptor in many tissues, such as vascular smooth muscle and the adrenal gland.

Its action is therefore independent of the pathways for angiotensin II synthesis.

There is also an AT 2 receptor found in many tissues, but AT 2 is not known to be associated with cardiovascular homeostasis.

Valsartan has much greater affinity (about 20,000-fold) for the AT 1 receptor than for the AT 2 receptor.

The primary metabolite of valsartan is essentially inactive with an affinity for the AT 1 receptor about one 200 th that of valsartan itself.

Blockade of the renin-angiotensin system with ACE inhibitors, which inhibit the biosynthesis of angiotensin II from angiotensin I, is widely used in the treatment of hypertension.

ACE inhibitors also inhibit the degradation of bradykinin, a reaction also catalyzed by ACE.

Because valsartan does not inhibit ACE (kininase II) it does not affect the response to bradykinin.

Whether this difference has clinical relevance is not yet known.

Valsartan does not bind to or block other hormone receptors or ion channels known to be important in cardiovascular regulation.

Blockade of the angiotensin II receptor inhibits the negative regulatory feedback of angiotensin II on renin secretion, but the resulting increased plasma renin activity and angiotensin II circulating levels do not overcome the effect of valsartan on blood pressure.

Hydrochlorothiazide is a thiazide diuretic.

Thiazides affect the renal tubular mechanisms of electrolyte reabsorption, directly increasing excretion of sodium and chloride in approximately equivalent amounts.

Indirectly, the diuretic action of hydrochlorothiazide reduces plasma volume, with consequent increases in plasma renin activity, increases in aldosterone secretion, increases in urinary potassium loss and decreases in serum potassium.

The renin-aldosterone link is mediated by angiotensin II, so coadministration of an angiotensin II receptor antagonist tends to reverse the potassium loss associated with these diuretics.

The mechanism of the antihypertensive effect of thiazides is unknown.

INDICATIONS AND USAGE

1 Valsartan and hydrochlorothiazide tablets are indicated for the treatment of hypertension, to lower blood pressure.

Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions.

These benefits have been seen in controlled trials of antihypertensive drugs from a wide variety of pharmacologic classes, including hydrochlorothiazide and the ARB class to which valsartan principally belongs.

There are no controlled trials demonstrating risk reduction with valsartan and hydrochlorothiazide tablets.

Control of high blood pressure should be part of comprehensive cardiovascular risk management, including, as appropriate, lipid control, diabetes management, antithrombotic therapy, smoking cessation, exercise and limited sodium intake.

Many patients will require more than one drug to achieve blood pressure goals.

For specific advice on goals and management, see published guidelines, such as those of the National High Blood Pressure Education Program’s Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC).

Numerous antihypertensive drugs, from a variety of pharmacologic classes and with different mechanisms of action, have been shown in randomized controlled trials to reduce cardiovascular morbidity and mortality, and it can be concluded that it is blood pressure reduction, and not some other pharmacologic property of the drugs, that is largely responsible for those benefits.

The largest and most consistent cardiovascular outcome benefit has been a reduction in the risk of stroke, but reductions in myocardial infarction and cardiovascular mortality have also been seen regularly.

Elevated systolic or diastolic pressure causes increased cardiovascular risk, and the absolute risk increase per mmHg is greater at higher blood pressures, so that even modest reductions of severe hypertension can provide substantial benefit.

Relative risk reduction from blood pressure reduction is similar across populations with varying absolute risk, so the absolute benefit is greater in patients who are at higher risk independent of their hypertension (for example, patients with diabetes or hyperlipidemia), and such patients would be expected to benefit from more aggressive treatment to a lower blood pressure goal.

Some antihypertensive drugs have smaller blood pressure effects (as monotherapy) in black patients, and many antihypertensive drugs have additional approved indications and effects (e.g., on angina, heart failure or diabetic kidney disease).

These considerations may guide selection of therapy.

Add-On Therapy: Valsartan and hydrochlorothiazide tablets may be used in patients whose blood pressure is not adequately controlled on monotherapy.

Replacement Therapy: Valsartan and hydrochlorothiazide tablets may be substituted for the titrated components.

Initial Therapy: Valsartan and hydrochlorothiazide tablets may be used as initial therapy in patients who are likely to need multiple drugs to achieve blood pressure goals.

The choice of valsartan and hydrochlorothiazide tablets as initial therapy for hypertension should be based on an assessment of potential benefits and risks.

Patients with stage 2 hypertension are at a relatively high risk for cardiovascular events (such as strokes, heart attacks and heart failure), kidney failure and vision problems, so prompt treatment is clinically relevant.

The decision to use a combination as initial therapy should be individualized and should be shaped by considerations such as baseline blood pressure, the target goal and the incremental likelihood of achieving goal with a combination compared to monotherapy.

Individual blood pressure goals may vary based upon the patient’s risk.

Data from the high dose multifactorial trial [see Clinical Studies (14.1) ] provides estimates of the probability of reaching a target blood pressure with valsartan and hydrochlorothiazide tablets compared to valsartan or hydrochlorothiazide monotherapy.

The figures below provide estimates of the likelihood of achieving systolic or diastolic blood pressure control with valsartan and hydrochlorothiazide tablets 320 mg/25 mg, based upon baseline systolic or diastolic blood pressure.

The curve of each treatment group was estimated by logistic regression modeling.

The estimated likelihood at the right tail of each curve is less reliable due to small numbers of subjects with high baseline blood pressures.

For example, a patient with a baseline blood pressure of 160/100 mmHg has about a 41% likelihood of achieving a goal of < 140 mmHg (systolic) and 60% likelihood of achieving < 90 mmHg (diastolic) on valsartan alone and the likelihood of achieving these goals on HCTZ alone is about 50% (systolic) or 57% (diastolic).

The likelihood of achieving these goals on valsartan and hydrochlorothiazide tablets rises to about 84% (systolic) or 80% (diastolic).

The likelihood of achieving these goals on placebo is about 23% (systolic) or 36% (diastolic).

Valsartan and hydrochlorothiazide is the combination tablet of valsartan, an angiotensin II receptor blocker (ARB) and hydrochlorothiazide (HCTZ), a diuretic.

Valsartan and hydrochlorothiazide tablets are indicated for the treatment of hypertension, to lower blood pressure: In patients not adequately controlled with monotherapy ( 1 ) As initial therapy in patients likely to need multiple drugs to achieve their blood pressure goals ( 1 ) Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions.

Figure 1.

Probability of Achieving Systolic Blood Pressure  140 mm/Hg at Week 8 Figure 2.

Probability of Achieving Diastolic Blood Pressure  90 mm/Hg at Week 8 Figure 3.

Probability of Achieving Systolic Blood Pressure  130 mm/Hg at Week 8 Figure 4.

Probability of Achieving Diastolic Blood Pressure  80 mm/Hg at Week 8

PEDIATRIC USE

8.4 Pediatric Use Safety and effectiveness of valsartan and hydrochlorothiazide in pediatric patients have not been established.

Neonates with a history of in utero exposure to valsartan and hydrochlorothiazide: If oliguria or hypotension occurs, direct attention toward support of blood pressure and renal perfusion.

Exchange transfusions or dialysis may be required as a means of reversing hypotension and/or substituting for disordered renal function.

PREGNANCY

8.1 Pregnancy Teratogenic Effects.

Pregnancy Category D Use of drugs that act on the renin-angiotensin system during the second and third trimesters of pregnancy reduces fetal renal function and increases fetal and neonatal morbidity and death.

Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations.

Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure and death.

When pregnancy is detected, discontinue valsartan and hydrochlorothiazide as soon as possible.

These adverse outcomes are usually associated with use of these drugs in the second and third trimester of pregnancy.

Most epidemiologic studies examining fetal abnormalities after exposure to antihypertensive use in the first trimester have not distinguished drugs affecting the renin-angiotensin system from other antihypertensive agents.

Appropriate management of maternal hypertension during pregnancy is important to optimize outcomes for both mother and fetus.

In the unusual case that there is no appropriate alternative to therapy with drugs affecting the renin-angiotensin system for a particular patient, apprise the mother of the potential risk to the fetus.

Perform serial ultrasound examinations to assess the intra-amniotic environment.

If oligohydramnios is observed, discontinue valsartan and hydrochlorothiazide, unless it is considered lifesaving for the mother.

Fetal testing may be appropriate, based on the week of pregnancy.

Patients and physicians should be aware, however, that oligohydramnios may not appear until after the fetus has sustained irreversible injury.

Closely observe infants with histories of in utero exposure to valsartan and hydrochlorothiazide for hypotension, oliguria and hyperkalemia [see Use in Specific Populations (8.4) ] .

Hydrochlorothiazide Thiazides can cross the placenta, and concentrations reached in the umbilical vein approach those in the maternal plasma.

Hydrochlorothiazide, like other diuretics, can cause placental hypoperfusion.

It accumulates in the amniotic fluid, with reported concentrations up to 19 times higher than in umbilical vein plasma.

Use of thiazides during pregnancy is associated with a risk of fetal or neonatal jaundice or thrombocytopenia.

Since they do not prevent or alter the course of EPH (Edema, Proteinuria, Hypertension) gestosis (pre-eclampsia), these drugs should not be used to treat hypertension in pregnant women.

The use of hydrochlorothiazide for other indications (e.g., heart disease) in pregnancy should be avoided.

NUSRING MOTHERS

8.3 Nursing Mothers It is not known whether valsartan is excreted in human milk.

Valsartan was excreted into the milk of lactating rats; however, animal breast milk drug levels may not accurately reflect human breast milk levels.

Hydrochlorothiazide is excreted in human breast milk.

Because many drugs are excreted into human milk and because of the potential for adverse reactions in nursing infants from valsartan and hydrochlorothiazide, a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother.

BOXED WARNING

WARNING: FETAL TOXICITY When pregnancy is detected, discontinue valsartan and hydrochlorothiazide tablets as soon as possible.

( 5.1 ) Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus.

( 5.1 ) WARNING: FETAL TOXICITY See full prescribing information for complete boxed warning.

When pregnancy is detected, discontinue valsartan and hydrochlorothiazide tablets as soon as possible.

( 5.1 ) Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus.

( 5.1 )

WARNING AND CAUTIONS

5 WARNINGS AND PRECAUTIONS Hypotension: Correct volume depletion prior to initiation ( 5.2 ) Observe for signs of fluid or electrolyte imbalance ( 5.9 ) Monitor renal function and potassium in susceptible patients ( 5.3 , 5.7 ) Exacerbation or activation of systemic lupus erythematosus ( 5.5 ) Acute angle-closure glaucoma ( 5.8 ) 5.1 Fetal Toxicity Pregnancy Category D Use of drugs that act on the renin-angiotensin system during the second and third trimesters of pregnancy reduces fetal renal function and increases fetal and neonatal morbidity and death.

Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations.

Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure and death.

When pregnancy is detected, discontinue valsartan and hydrochlorothiazide as soon as possible [see Use in Specific Populations (8.1) ] .

Intrauterine exposure to thiazide diuretics is associated with fetal or neonatal jaundice, thrombocytopenia, and possibly other adverse reactions that have occurred in adults.

5.2 Hypotension in Volume- and/or Salt-Depleted Patients Excessive reduction of blood pressure was rarely seen (0.7%) in patients with uncomplicated hypertension treated with valsartan and hydrochlorothiazide in controlled trials.

In patients with an activated renin-angiotensin system, such as volume- and/or salt-depleted patients receiving high doses of diuretics, symptomatic hypotension may occur.

This condition should be corrected prior to administration of valsartan and hydrochlorothiazide, or the treatment should start under close medical supervision.

If hypotension occurs, the patient should be placed in the supine position and, if necessary, given an intravenous infusion of normal saline.

A transient hypotensive response is not a contraindication to further treatment, which usually can be continued without difficulty once the blood pressure has stabilized.

5.3 Impaired Renal Function Changes in renal function including acute renal failure can be caused by drugs that inhibit the renin-angiotensin system and by diuretics.

Patients whose renal function may depend in part on the activity of the renin-angiotensin system (e.g., patients with renal artery stenosis, chronic kidney disease, severe congestive heart failure or volume depletion) may be at particular risk of developing acute renal failure on valsartan and hydrochlorothiazide.

Monitor renal function periodically in these patients.

Consider withholding or discontinuing therapy in patients who develop a clinically significant decrease in renal function on valsartan and hydrochlorothiazide [see Drug Interactions (7) ] .

5.4 Hypersensitivity Reaction Hydrochlorothiazide Hypersensitivity reactions to hydrochlorothiazide may occur in patients with or without a history of allergy or bronchial asthma, but are more likely in patients with such a history.

5.5 Systemic Lupus Erythematosus Hydrochlorothiazide Thiazide diuretics have been reported to cause exacerbation or activation of systemic lupus erythematosus.

5.6 Lithium Interaction Increases in serum lithium concentrations and lithium toxicity have been reported with concomitant use of valsartan or thiazide diuretics.

Monitor lithium levels in patients receiving valsartan and hydrochlorothiazide and lithium [see Drug Interactions (7) ] .

5.7 Potassium Abnormalities Valsartan and Hydrochlorothiazide In the controlled trials of various doses of valsartan and hydrochlorothiazide the incidence of hypertensive patients who developed hypokalemia (serum potassium 5.7 mEq/L) was 0.4%.

Hydrochlorothiazide can cause hypokalemia and hyponatremia.

Hypomagnesemia can result in hypokalemia which appears difficult to treat despite potassium repletion.

Drugs that inhibit the renin-angiotensin system can cause hyperkalemia.

Monitor serum electrolytes periodically.

If hypokalemia is accompanied by clinical signs (e.g., muscular weakness, paresis or ECG alterations), valsartan and hydrochlorothiazide should be discontinued.

Correction of hypokalemia and any coexisting hypomagnesemia is recommended prior to the initiation of thiazides.

Some patients with heart failure have developed increases in potassium with valsartan therapy.

These effects are usually minor and transient, and they are more likely to occur in patients with preexisting renal impairment.

Dosage reduction and/or discontinuation of the diuretic and/or valsartan may be required [see Adverse Reactions (6.1) ].

5.8 Acute Myopia and Secondary Angle-Closure Glaucoma Hydrochlorothiazide, a sulfonamide, can cause an idiosyncratic reaction, resulting in acute transient myopia and acute angle-closure glaucoma.

Symptoms include acute onset of decreased visual acuity or ocular pain and typically occur within hours to weeks of drug initiation.

Untreated acute angle-closure glaucoma can lead to permanent vision loss.

The primary treatment is to discontinue hydrochlorothiazide as rapidly as possible.

Prompt medical or surgical treatments may need to be considered if the intraocular pressure remains uncontrolled.

Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy.

5.9 Metabolic Disturbances Hydrochlorothiazide Hydrochlorothiazide may alter glucose tolerance and raise serum levels of cholesterol and triglycerides.

Hydrochlorothiazide may raise the serum uric acid level due to reduced clearance of uric acid and may cause or exacerbate hyperuricemia and precipitate gout in susceptible patients.

Hydrochlorothiazide decreases urinary calcium excretion and may cause elevations of serum calcium.

Monitor calcium levels in patients with hypercalcemia receiving valsartan and hydrochlorothiazide.

INFORMATION FOR PATIENTS

17 PATIENT COUNSELING INFORMATION Information for Patients: Pregnancy: Female patients of childbearing age should be told about the consequences of exposure to valsartan and hydrochlorothiazide during pregnancy.

Discuss treatment options with women planning to become pregnant.

Patients should be asked to report pregnancies to their physicians as soon as possible.

Symptomatic Hypotension: A patient receiving valsartan and hydrochlorothiazide should be cautioned that lightheadedness can occur, especially during the first days of therapy, and that it should be reported to the prescribing physician.

The patients should be told that if syncope occurs, valsartan and hydrochlorothiazide should be discontinued until the physician has been consulted.

All patients should be cautioned that inadequate fluid intake, excessive perspiration, diarrhea or vomiting can lead to an excessive fall in blood pressure, with the same consequences of lightheadedness and possible syncope.

Potassium Supplements: A patient receiving valsartan and hydrochlorothiazide should be told not to use potassium supplements or salt substitutes containing potassium without consulting the prescribing physician.

FDA-Approved Patient Labeling PATIENT INFORMATION LEAFLET VALSARTAN AND HYDROCHLOROTHIAZIDE TABLETS, USP (val sar’ tan) (hye” droe klor” oh thye’ a zide) 80 mg/12.5 mg, 160 mg/12.5 mg, 160 mg/25 mg, 320 mg/12.5 mg and 320 mg/25 mg Read the Patient Information that comes with valsartan and hydrochlorothiazide tablets before you start taking it and each time you get a refill.

There may be new information.

This leaflet does not take the place of talking with your doctor about your condition and treatment.

If you have any questions about valsartan and hydrochlorothiazide tablets, ask your doctor or pharmacist.

What is the most important information I should know about valsartan and hydrochlorothiazide tablets? Valsartan and hydrochlorothiazide tablets can cause harm or death to an unborn baby.

Talk to your doctor about other ways to lower your blood pressure if you plan to become pregnant.

If you get pregnant while taking valsartan and hydrochlorothiazide tablets, tell your doctor right away.

What are valsartan and hydrochlorothiazide tablets? Valsartan and hydrochlorothiazide tablets contains two prescription medicines: 1.

valsartan, an angiotensin receptor blocker (ARB) 2.

hydrochlorothiazide (HCTZ), a water pill (diuretic) Valsartan and hydrochlorothiazide tablets may be used to lower high blood pressure (hypertension) in adults- when one medicine to lower your high blood pressure is not enough as the first medicine to lower high blood pressure if your doctor decides you are likely to need more than one medicine.

Valsartan and hydrochlorothiazide tablets has not been studied in children under 18 years of age.

Who should not take valsartan and hydrochlorothiazide tablets? Do not take valsartan and hydrochlorothiazide tablets if you: are allergic to any of the ingredients in valsartan and hydrochlorothiazide tablets.

See the end of this leaflet for a complete list of ingredients in valsartan and hydrochlorothiazide tablets.

make less urine due to kidney problems are allergic to medicines that contain sulfonamides.

What should I tell my doctor before taking valsartan and hydrochlorothiazide tablets? Tell your doctor about all your medical conditions including if you: are pregnant or plan to become pregnant.

See “What is the most important information I should know about valsartan and hydrochlorothiazide tablets?” are breast-feeding.

Valsartan and hydrochlorothiazide passes into breast milk.

You should choose either to take valsartan and hydrochlorothiazide tablets or breast-feed, but not both.

have liver problems have kidney problems have or had gallstones have Lupus have low levels of potassium (with or without symptoms such as muscle weakness, muscle spasms, abnormal heart rhythm) or magnesium in your blood have high levels of calcium in your blood (with or without symptoms such as nausea, vomiting, constipation, stomach pain, frequent urination, thirst, muscle weakness and twitching).

have high levels of uric acid in the blood.

have ever had a reaction called angioedema to another blood pressure medication.

Angioedema causes swelling of the face, lips, tongue, throat, and may cause difficulty breathing.

Tell your doctor about all the medicines you take including prescription and non-prescription medicines, vitamins and herbal supplements.

Some of your other medicines and valsartan and hydrochlorothiazide tablets could affect each other, causing serious side effects.

Especially, tell your doctor if you take: other medicines for high blood pressure or a heart problem water pills (diuretics) potassium supplements.

Your doctor may check the amount of potassium in your blood periodically.

a salt substitute.

Your doctor may check the amount of potassium in your blood periodically.

antidiabetic medicines including insulin narcotic pain medicines sleeping pills lithium, a medicine used in some types of depression (Eskalith ®* , Lithobid ®* , Lithium Carbonate, Lithium Citrate) aspirin or other medicines called Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), like ibuprofen or naproxen digoxin or other digitalis glycosides (a heart medicine) muscle relaxants (medicines used during operations) certain cancer medicines, like cyclophosphamide or methotrexate certain antibiotics (rifamycin group), a drug used to protect against transplant rejection (cyclosporin) or an antiretroviral drug used to treat HIV/AIDS infection (ritonavir).

These drugs may increase the effect of valsartan.

Ask your doctor if you are not sure if you are taking one of these medicines.

Know the medicines you take.

Keep a list of your medicines with you to show to your doctor and pharmacist when a new medicine is prescribed.

Talk to your doctor or pharmacist before you start taking any new medicine.

Your doctor or pharmacist will know what medicines are safe to take together.

How should I take valsartan and hydrochlorothiazide tablets? Take valsartan and hydrochlorothiazide tablets exactly as prescribed by your doctor.

Your doctor may change your dose if needed.

Take valsartan and hydrochlorothiazide tablets once each day.

Valsartan and hydrochlorothiazide tablets can be taken with or without food.

If you miss a dose, take it as soon as you remember.

If it is close to your next dose, do not take the missed dose.

Just take the next dose at your regular time.

If you take too much valsartan and hydrochlorothiazide, call your doctor or Poison Control Center, or go to the nearest hospital emergency room.

What should I avoid while taking valsartan and hydrochlorothiazide tablets? You should not take valsartan and hydrochlorothiazide tablets during pregnancy.

See “What is the most important information I should know about valsartan and hydrochlorothiazide tablets?” What are the possible side effects of valsartan and hydrochlorothiazide tablets? Valsartan and hydrochlorothiazide tablets may cause serious side effects including: Harm to an unborn baby causing injury and even death.

See “What is the most important information I should know about valsartan and hydrochlorothiazide tablets?” Low blood pressure (hypotension).

Low blood pressure is most likely to happen if you: take water pills are on a low salt diet get dialysis treatments have heart problems get sick with vomiting or diarrhea drink alcohol Lie down if you feel faint or dizzy.

Call your doctor right away.

Allergic reactions.

People with and without allergy problems or asthma who take valsartan and hydrochlorothiazide tablets may get allergic reactions.

Worsening of Lupus.

Hydrochlorothiazide, one of the medicines in valsartan and hydrochlorothiazide tablets may cause Lupus to become active or worse.

Fluid and electrolyte (salt) problems.

Tell your doctor about any of the following signs and symptoms of fluid and electrolyte problems: dry mouth thirst lack of energy (lethargic) weakness drowsiness restlessness confusion seizures muscle pain or cramps muscle fatigue very low urine output fast heartbeat nausea and vomiting Kidney problems.

Kidney problems may become worse in people that already have kidney disease.

Some people will have changes on blood tests for kidney function and may need a lower dose of valsartan and hydrochlorothiazide tablets.

Call your doctor if you get swelling in your feet, ankles, or hands, or unexplained weight gain.

If you have heart failure, your doctor should check your kidney function before prescribing valsartan and hydrochlorothiazide tablets.

Skin rash.

Call your doctor right away if you have an unusual skin rash.

Eye Problems.

One of the medicines in valsartan and hydrochlorothiazide tablets can cause eye problems that may lead to vision loss.

Symptoms of eye problems can happen within hours to weeks of starting valsartan and hydrochlorothiazide tablets.

Tell your doctor right away if you have: decrease in vision eye pain Other side effects were generally mild and brief.

They generally have not caused patients to stop taking valsartan and hydrochlorothiazide tablets.

Tell your doctor if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of valsartan and hydrochlorothiazide tablets.

For a complete list, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects.

You may report side effects to FDA at 1-800-FDA-1088.

How do I store valsartan and hydrochlorothiazide tablets? Store valsartan and hydrochlorothiazide tablets at 20° to 25°C (68° to 77°F).

Keep valsartan and hydrochlorothiazide tablets in a closed container in a dry place.

Keep valsartan and hydrochlorothiazide tablets and all medicines out of the reach of children.

General information about valsartan and hydrochlorothiazide tablets Medicines are sometimes prescribed for conditions that are not mentioned in patient information leaflets.

Do not use valsartan and hydrochlorothiazide tablets for a condition for which it was not prescribed.

Do not give valsartan and hydrochlorothiazide tablets to other people, even if they have the same symptoms you have.

It may harm them.

This leaflet summarizes the most important information about valsartan and hydrochlorothiazide tablets.

If you would like more information, talk with your doctor.

You can ask your doctor or pharmacist for information about valsartan and hydrochlorothiazide tablets that is written for health professionals.

For more information about valsartan and hydrochlorothiazide tablets, call Mylan Pharmaceuticals Inc.

at 1-877-446-3679 (1-877-4-INFO-RX).

What are the ingredients in valsartan and hydrochlorothiazide tablets? Active ingredients: Valsartan and hydrochlorothiazide Inactive ingredients: colloidal silicon dioxide, crospovidone, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, polydextrose, polyethylene glycol, povidone, pregelatinized starch(corn), sodium lauryl sulfate, titanium dioxide and triacetin.

The 80 mg/12.5 mg, 160 mg/12.5 mg, 160 mg/25 mg and 320 mg/12.5 mg tablets also contain red iron oxide and yellow iron oxide.

The 320 mg/25 mg tablet also contains FD&C Blue No.

2 Aluminum Lake and FD&C Yellow No.

6 Aluminum Lake.

What is high blood pressure (hypertension)? Blood pressure is the force in your blood vessels when your heart beats and when your heart rests.

You have high blood pressure when the force is too much.

Valsartan and hydrochlorothiazide tablets can help your blood vessels relax and reduce the amount of water in your body so your blood pressure is lower.

Medicines that lower blood pressure lower your risk of having a stroke or heart attack.

High blood pressure makes the heart work harder to pump blood throughout the body and causes damage to the blood vessels.

If high blood pressure is not treated, it can lead to stroke, heart attack, heart failure, kidney failure, and vision problems.

* Registered trademarks are property of their respective owners.

Manufactured by: Mylan Pharmaceuticals Inc.

Morgantown, WV 26505 U.S.A.

Mylan Institutional Inc.

Distributed by: Rockford, IL 61103 U.S.A.

S-11364 R1 9/14

DOSAGE AND ADMINISTRATION

2 Dose once daily.

Titrate as needed to a maximum dose of 320 mg/25 mg ( 2 ) May be used as add-on/switch therapy for patients not adequately controlled on any of the components (valsartan or HCTZ) ( 2 ) May be substituted for titrated components ( 2.3 ) 2.1 General Considerations The usual starting dose is valsartan and hydrochlorothiazide tablets 160 mg/12.5 mg once daily.

The dosage can be increased after 1 to 2 weeks of therapy to a maximum of one 320 mg/25 mg tablet once daily as needed to control blood pressure [see Clinical Studies (14.2) ].

Maximum antihypertensive effects are attained within 2 to 4 weeks after a change in dose.

2.2 Add-On Therapy A patient whose blood pressure is not adequately controlled with valsartan (or another ARB) alone or hydrochlorothiazide alone may be switched to combination therapy with valsartan and hydrochlorothiazide tablets.

A patient who experiences dose-limiting adverse reactions on either component alone may be switched to valsartan and hydrochlorothiazide tablets containing a lower dose of that component in combination with the other to achieve similar blood pressure reductions.

The clinical response to valsartan and hydrochlorothiazide tablets should be subsequently evaluated and if blood pressure remains uncontrolled after 3 to 4 weeks of therapy, the dose may be titrated up to a maximum of 320 mg/25 mg.

2.3 Replacement Therapy Valsartan and hydrochlorothiazide tablets may be substituted for the titrated components.

2.4 Initial Therapy Valsartan and hydrochlorothiazide tablets are not recommended as initial therapy in patients with intravascular volume depletion [see Warnings and Precautions (5.2) ] .

2.5 Use with Other Antihypertensive Drugs Valsartan and hydrochlorothiazide tablets may be administered with other antihypertensive agents.

Atovaquone 250 MG / proguanil hydrochloride 100 MG Oral Tablet [Malarone]

DRUG INTERACTIONS

7 Administration with rifampin or rifabutin is known to reduce atovaquone concentrations; concomitant use with MALARONE is not recommended.

( ) • 7.1 Proguanil may potentiate anticoagulant effect of warfarin and other coumarin-based anticoagulants.

Caution advised when initiating or withdrawing MALARONE in patients on anticoagulants; coagulation tests should be closely monitored.

( ) • 7.2 Tetracycline may reduce atovaquone concentrations; parasitemia should be closely monitored.

( ) • 7.3 7.1 Rifampin/Rifabutin Concomitant administration of rifampin or rifabutin is known to reduce atovaquone concentrations .

The concomitant administration of MALARONE and rifampin or rifabutin is not recommended.

[see Clinical Pharmacology (12.3)] 7.2 Anticoagulants Proguanil may potentiate the anticoagulant effect of warfarin and other coumarin-based anticoagulants.

The mechanism of this potential drug interaction has not been established.

Caution is advised when initiating or withdrawing malaria prophylaxis or treatment with MALARONE in patients on continuous treatment with coumarin-based anticoagulants.

When these products are administered concomitantly, coagulation tests should be closely monitored.

7.3 Tetracycline Concomitant treatment with tetracycline has been associated with a reduction in plasma concentrations of atovaquone .

Parasitemia should be closely monitored in patients receiving tetracycline.

[see Clinical Pharmacology (12.3)] 7.4 Metoclopramide While antiemetics may be indicated for patients receiving MALARONE, metoclopramide may reduce the bioavailability of atovaquone and should be used only if other antiemetics are not available .

[see Clinical Pharmacology (12.3)] 7.5 Indinavir Concomitant administration of atovaquone and indinavir did not result in any change in the steady‑state AUC and C of indinavir but resulted in a decrease in the C of indinavir .

Caution should be exercised when prescribing atovaquone with indinavir due to the decrease in trough concentrations of indinavir.

max trough [see Clinical Pharmacology (12.3)]

OVERDOSAGE

10 There is no information on overdoses of MALARONE substantially higher than the doses recommended for treatment.

There is no known antidote for atovaquone, and it is currently unknown if atovaquone is dialyzable.

Overdoses up to 31,500 mg of atovaquone have been reported.

In one such patient who also took an unspecified dose of dapsone, methemoglobinemia occurred.

Rash has also been reported after overdose.

Overdoses of proguanil hydrochloride as large as 1,500 mg have been followed by complete recovery, and doses as high as 700 mg twice daily have been taken for over 2 weeks without serious toxicity.

Adverse experiences occasionally associated with proguanil hydrochloride doses of 100 to 200 mg/day, such as epigastric discomfort and vomiting, would be likely to occur with overdose.

There are also reports of reversible hair loss and scaling of the skin on the palms and/or soles, reversible aphthous ulceration, and hematologic side effects.

DESCRIPTION

11 MALARONE (atovaquone and proguanil hydrochloride) Tablets (adult strength) and MALARONE (atovaquone and proguanil hydrochloride) Pediatric Tablets, for oral administration, contain a fixed‑dose combination of the antimalarial agents atovaquone and proguanil hydrochloride.

The chemical name of atovaquone is -2-[4-(4-chlorophenyl)cyclohexyl]-3-hydroxy-1,4-naphthalenedione.

Atovaquone is a yellow crystalline solid that is practically insoluble in water.

It has a molecular weight of 366.84 and the molecular formula C H ClO .

The compound has the following structural formula: trans 22 19 3 The chemical name of proguanil hydrochloride is 1-(4-chlorophenyl)-5-isopropyl-biguanide hydrochloride.

Proguanil hydrochloride is a white crystalline solid that is sparingly soluble in water.

It has a molecular weight of 290.22 and the molecular formula C H ClN •HCl.

The compound has the following structural formula: 11 16 5 Each MALARONE Tablet (adult strength) contains 250 mg of atovaquone and 100 mg of proguanil hydrochloride and each MALARONE Pediatric Tablet contains 62.5 mg of atovaquone and 25 mg of proguanil hydrochloride.

The inactive ingredients in both tablets are low‑substituted hydroxypropyl cellulose, magnesium stearate, microcrystalline cellulose, poloxamer 188, povidone K30, and sodium starch glycolate.

The tablet coating contains hypromellose, polyethylene glycol 400, polyethylene glycol 8000, red iron oxide, and titanium dioxide.

atovaquone molecular structure proguanil hydrochloride molecular structure

CLINICAL STUDIES

14 14.1 Prevention of Malaria P.

falciparum MALARONE was evaluated for prophylaxis of malaria in 5 clinical trials in malaria‑endemic areas and in 3 active‑controlled trials in non‑immune travelers to malaria‑endemic areas.

P.

falciparum Three placebo‑controlled trials of 10 to 12 weeks’ duration were conducted among residents of malaria‑endemic areas in Kenya, Zambia, and Gabon.

The mean age of subjects was 30 (range 17‑55), 32 (range 16‑64), and 10 (range 5‑16) years, respectively.

Of a total of 669 randomized patients (including 264 pediatric patients 5 to 16 years of age), 103 were withdrawn for reasons other than falciparum malaria or drug‑related adverse events (55% of these were lost to follow‑up and 45% were withdrawn for protocol violations).

The results are listed in Table 6.

Table 6.

Prevention of Parasitemia in Placebo Controlled Clinical Trials of MALARONE for Prophylaxis of P.

falciparum Malaria in Residents of Malaria Endemic Areas a MALARONE Placebo Total number of patients randomized 326 343 Failed to complete study 57 46 Developed parasitemia ( ) P.

falciparum 2 92 Free of parasitemia during the 10 to 12-week period of prophylactic therapy.

a In another study, 330 Gabonese pediatric patients (weighing 13 to 40 kg, and aged 4 to 14 years) who had received successful open‑label radical cure treatment with artesunate, were randomized to receive either MALARONE (dosage based on body weight) or placebo in a double‑blind fashion for 12 weeks.

Blood smears were obtained weekly and any time malaria was suspected.

Nineteen of the 165 children given MALARONE and 18 of 165 patients given placebo withdrew from the study for reasons other than parasitemia (primary reason was lost to follow-up).

One out of 150 evaluable patients (<1%) who received MALARONE developed parasitemia while receiving prophylaxis with MALARONE compared with 31 (22%) of the 144 evaluable placebo recipients.

P.

falciparum In a 10‑week study in 175 South African subjects who moved into malaria‑endemic areas and were given prophylaxis with 1 MALARONE Tablet daily, parasitemia developed in 1 subject who missed several doses of medication.

Since no placebo control was included, the incidence of malaria in this study was not known.

Two active-controlled trials were conducted in non‑immune travelers who visited a malaria‑endemic area.

The mean duration of travel was 18 days (range 2 to 38 days).

Of a total of 1,998 randomized patients who received MALARONE or controlled drug, 24 discontinued from the study before follow-up evaluation 60 days after leaving the endemic area.

Nine of these were lost to follow-up, 2 withdrew because of an adverse experience, and 13 were discontinued for other reasons.

These trials were not large enough to allow for statements of comparative efficacy.

In addition, the true exposure rate to malaria in both trials is unknown.

The results are listed in Table 7.

P.

falciparum Table 7.

Prevention of Parasitemia in Active-Controlled Clinical Trials of MALARONE for Prophylaxis of P.

falciparum Malaria in Non-Immune Travelers a MALARONE Mefloquine Chloroquine plus Proguanil Total number of randomized patients who received study drug 1,004 483 511 Failed to complete study 14 6 4 Developed parasitemia ( ) P.

falciparum 0 0 3 Free of parasitemia during the period of prophylactic therapy.

a A third randomized, open‑label study was conducted which included 221 otherwise healthy pediatric patients (weighing ≥11 kg and 2 to 17 years of age) who were at risk of contracting malaria by traveling to an endemic area.

The mean duration of travel was 15 days (range 1 to 30 days).

Prophylaxis with MALARONE (n = 110, dosage based on body weight) began 1 or 2 days before entering the endemic area and lasted until 7 days after leaving the area.

A control group (n = 111) received prophylaxis with chloroquine/proguanil dosed according to WHO guidelines.

No cases of malaria occurred in either group of children.

However, the study was not large enough to allow for statements of comparative efficacy.

In addition, the true exposure rate to malaria in this study is unknown.

P.

falciparum In separate trials with small numbers of volunteers, atovaquone and proguanil hydrochloride were independently shown to have causal prophylactic activity directed against liver‑stage parasites of .

Six patients given a single dose of atovaquone 250 mg 24 hours prior to malaria challenge were protected from developing malaria, whereas all 4 placebo‑treated patients developed malaria.

Causal Prophylaxis: P.

falciparum During the 4 weeks following cessation of prophylaxis in clinical trial participants who remained in malaria‑endemic areas and were available for evaluation, malaria developed in 24 of 211 (11.4%) subjects who took placebo and 9 of 328 (2.7%) who took MALARONE.

While new infections could not be distinguished from recrudescent infections, all but 1 of the infections in patients treated with MALARONE occurred more than 15 days after stopping therapy.

The single case occurring on day 8 following cessation of therapy with MALARONE probably represents a failure of prophylaxis with MALARONE.

The possibility that delayed cases of malaria may occur some time after stopping prophylaxis with MALARONE cannot be ruled out.

Hence, returning travelers developing febrile illnesses should be investigated for malaria.

P.

falciparum 14.2 Treatment of Acute, Uncomplicated Malaria Infections P.

falciparum In 3 phase II clinical trials, atovaquone alone, proguanil hydrochloride alone, and the combination of atovaquone and proguanil hydrochloride were evaluated for the treatment of acute, uncomplicated malaria caused by .

Among 156 evaluable patients, the parasitological cure rate (elimination of parasitemia with no recurrent parasitemia during follow‑up for 28 days) was 59/89 (66%) with atovaquone alone, 1/17 (6%) with proguanil hydrochloride alone, and 50/50 (100%) with the combination of atovaquone and proguanil hydrochloride.

P.

falciparum MALARONE was evaluated for treatment of acute, uncomplicated malaria caused by in 8 phase III randomized, open-label, controlled clinical trials (N = 1,030 enrolled in both treatment groups).

The mean age of subjects was 27 years and 16% were children ≤12 years of age; 74% of subjects were male.

Evaluable patients included those whose outcome at 28 days was known.

Among 471 evaluable patients treated with the equivalent of 4 MALARONE Tablets once daily for 3 days, 464 had a sensitive response (elimination of parasitemia with no recurrent parasitemia during follow‑up for 28 days) (Table 8).

Seven patients had a response of RI resistance (elimination of parasitemia but with recurrent parasitemia between 7 and 28 days after starting treatment).

In these trials, the response to treatment with MALARONE was similar to treatment with the comparator drug in 4 trials.

P.

falciparum Table 8.

Parasitological Response in 8 Clinical Trials of MALARONE for Treatment of P.

falciparum Malaria Study Site MALARONE a Comparator Evaluable Patients (n) % Sensitive Response b Drug(s) Evaluable Patients (n) % Sensitive Response b Brazil 74 98.6% Quinine and tetracycline 76 100.0% Thailand 79 100.0% Mefloquine 79 86.1% France c 21 100.0% Halofantrine 18 100.0% Kenya c,d 81 93.8% Halofantrine 83 90.4% Zambia 80 100.0% Pyrimethamine/ sulfadoxine (P/S) 80 98.8% Gabon c 63 98.4% Amodiaquine 63 81.0% Philippines 54 100.0% Chloroquine (Cq) Cq and P/S 23 32 30.4% 87.5% Peru 19 100.0% Chloroquine P/S 13 7 7.7% 100.0% MALARONE = 1,000 mg atovaquone and 400 mg proguanil hydrochloride (or equivalent based on body weight for patients weighing ≤40 kg) once daily for 3 days.

a Elimination of parasitemia with no recurrent parasitemia during follow‑up for 28 days.

b Patients hospitalized only for acute care.

Follow‑up conducted in outpatients.

c Study in pediatric patients 3 to 12 years of age.

d When these 8 trials were pooled and 2 additional trials evaluating MALARONE alone (without a comparator arm) were added to the analysis, the overall efficacy (elimination of parasitemia with no recurrent parasitemia during follow‑up for 28 days) in 521 evaluable patients was 98.7%.

The efficacy of MALARONE in the treatment of the erythrocytic phase of nonfalciparum malaria was assessed in a small number of patients.

Of the 23 patients in Thailand infected with and treated with atovaquone/proguanil hydrochloride 1,000 mg/400 mg daily for 3 days, parasitemia cleared in 21 (91.3%) at 7 days.

Parasite relapse occurred commonly when malaria was treated with MALARONE alone.

Relapsing malarias including and require additional treatment to prevent relapse.

P.

vivax P.

vivax P.

vivax P.

ovale The efficacy of MALARONE in treating acute uncomplicated malaria in children weighing ≥5 and <11 kg was examined in an open‑label, randomized trial conducted in Gabon.

Patients received either MALARONE (2 or 3 MALARONE Pediatric Tablets once daily depending upon body weight) for 3 days (n = 100) or amodiaquine (10 mg/kg/day) for 3 days (n = 100).

In this study, the MALARONE Tablets were crushed and mixed with condensed milk just prior to administration.

An adequate clinical response (elimination of parasitemia with no recurrent parasitemia during follow‑up for 28 days) was obtained in 95% (87/92) of the evaluable pediatric patients who received MALARONE and in 53% (41/78) of those evaluable who received amodiaquine.

A response of RI resistance (elimination of parasitemia but with recurrent parasitemia between 7 and 28 days after starting treatment) was noted in 3% and 40% of the patients, respectively.

Two cases of RIII resistance (rising parasite count despite therapy) were reported in the patients receiving MALARONE.

There were 4 cases of RIII in the amodiaquine arm.

P.

falciparum

HOW SUPPLIED

16 /STORAGE AND HANDLING NDC:54569-5762-0 in a BOTTLE of 12 TABLET, FILM COATEDS

GERIATRIC USE

8.5 Geriatric Use Clinical trials of MALARONE did not include sufficient numbers of subjects aged 65 years and older to determine whether they respond differently from younger subjects.

In general, dose selection for an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, the higher systemic exposure to cycloguanil, and the greater frequency of concomitant disease or other drug therapy.

[See Clinical Pharmacology (12.3).]

DOSAGE FORMS AND STRENGTHS

3 Each MALARONE Tablet (adult strength) contains 250 mg atovaquone and 100 mg proguanil hydrochloride.

MALARONE Tablets are pink, film‑coated, round, biconvex tablets engraved with “GX CM3” on one side.

Each MALARONE Pediatric Tablet contains 62.5 mg atovaquone and 25 mg proguanil hydrochloride.

MALARONE Pediatric Tablets are pink, film‑coated, round, biconvex tablets engraved with “GX CG7” on one side.

Tablets (adult strength): 250 mg atovaquone and 100 mg proguanil hydrochloride.

( ) • 3 Pediatric Tablets: 62.5 mg atovaquone and 25 mg proguanil hydrochloride.

( ) • 3

MECHANISM OF ACTION

12.1 Mechanism of Action The constituents of MALARONE, atovaquone and proguanil hydrochloride, interfere with 2 different pathways involved in the biosynthesis of pyrimidines required for nucleic acid replication.

Atovaquone is a selective inhibitor of parasite mitochondrial electron transport.

Proguanil hydrochloride primarily exerts its effect by means of the metabolite cycloguanil, a dihydrofolate reductase inhibitor.

Inhibition of dihydrofolate reductase in the malaria parasite disrupts deoxythymidylate synthesis.

INDICATIONS AND USAGE

1 MALARONE is an antimalarial indicated for: prophylaxis of malaria, including in areas where chloroquine resistance has been reported.

( ) • Plasmodium falciparum 1.1 treatment of acute, uncomplicated malaria.

( ) • P.

falciparum 1.2 1.2 Treatment of Malaria MALARONE is indicated for the treatment of acute, uncomplicated malaria.

MALARONE has been shown to be effective in regions where the drugs chloroquine, halofantrine, mefloquine, and amodiaquine may have unacceptable failure rates, presumably due to drug resistance.

P.

falciparum

PEDIATRIC USE

8.4 Pediatric Use Safety and effectiveness have not been established in pediatric patients who weigh less than 11 kg.

The efficacy and safety of MALARONE have been established for the prophylaxis of malaria in controlled trials involving pediatric patients weighing 11 kg or more .

Prophylaxis of Malaria: [see Clinical Studies (14.1)] Safety and effectiveness have not been established in pediatric patients who weigh less than 5 kg.

The efficacy and safety of MALARONE for the treatment of malaria have been established in controlled trials involving pediatric patients weighing 5 kg or more .

Treatment of Malaria: [see Clinical Studies (14.2)]

PREGNANCY

8.1 Pregnancy Pregnancy Category C Atovaquone was not teratogenic and did not cause reproductive toxicity in rats at doses up to 1,000 mg/kg/day corresponding to maternal plasma concentrations up to 7.3 times the estimated human exposure during treatment of malaria based on AUC.

In rabbits, atovaquone caused adverse fetal effects and maternal toxicity at a dose of 1,200 mg/kg/day corresponding to plasma concentrations that were approximately 1.3 times the estimated human exposure during treatment of malaria based on AUC.

Adverse fetal effects in rabbits, including decreased fetal body lengths and increased early resorptions and post-implantation losses, were observed only in the presence of maternal toxicity.

Atovaquone: In a pre- and post-natal study in rats, atovaquone did not produce adverse effects in offspring at doses up to 1,000 mg/kg/day corresponding to AUC exposures of approximately 7.3 times the estimated human exposure during treatment of malaria.

A pre- and post-natal study in Sprague-Dawley rats revealed no adverse effects at doses up to 16 mg/kg/day of proguanil hydrochloride (up to 0.04-times the average human exposure based on AUC).

Pre- and post-natal studies of proguanil in animals at exposures similar to or greater than those observed in humans have not been conducted.

Proguanil: The combination of atovaquone and proguanil hydrochloride was not teratogenic in pregnant rats at atovaquone:proguanil hydrochloride (50:20 mg/kg/day) corresponding to plasma concentrations up to 1.7 and 0.1 times, respectively, the estimated human exposure during treatment of malaria based on AUC.

In pregnant rabbits, the combination of atovaquone and proguanil hydrochloride was not teratogenic or embryotoxic to rabbit fetuses at atovaquone:proguanil hydrochloride (100:40 mg/kg/day) corresponding to plasma concentrations of approximately 0.3 and 0.5 times, respectively, the estimated human exposure during treatment of malaria based on AUC.

Atovaquone and Proguanil: There are no adequate and well‑controlled studies of atovaquone and/or proguanil hydrochloride in pregnant women.

MALARONE should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Falciparum malaria carries a higher risk of morbidity and mortality in pregnant women than in the general population.

Maternal death and fetal loss are both known complications of falciparum malaria in pregnancy.

In pregnant women who must travel to malaria‑endemic areas, personal protection against mosquito bites should always be employed in addition to antimalarials.

[See Patient Counseling Information (17).] The proguanil component of MALARONE acts by inhibiting the parasitic dihydrofolate reductase .

However, there are no clinical data indicating that folate supplementation diminishes drug efficacy.

For women of childbearing age receiving folate supplements to prevent neural tube birth defects, such supplements may be continued while taking MALARONE.

[see Clinical Pharmacology (12.1)]

NUSRING MOTHERS

8.3 Nursing Mothers It is not known whether atovaquone is excreted into human milk.

In a rat study, atovaquone concentrations in the milk were 30% of the concurrent atovaquone concentrations in the maternal plasma.

Proguanil is excreted into human milk in small quantities.

Caution should be exercised when MALARONE is administered to a nursing woman.

WARNING AND CAUTIONS

5 WARNINGS AND PRECAUTIONS Atovaquone absorption may be reduced in patients with diarrhea or vomiting.

If used in patients who are vomiting, parasitemia should be closely monitored and the use of an antiemetic considered.

In patients with severe or persistent diarrhea or vomiting, alternative antimalarial therapy may be required.

( ) • 5.1 In mixed and infection, relapse occurred commonly when patients were treated with MALARONE alone.

( ) • P.

falciparum Plasmodium vivax P.

vivax 5.2 In the event of recrudescent infections after treatment or prophylaxis failure, patients should be treated with a different blood schizonticide.

( ) • P.

falciparum 5.2 Elevated liver laboratory tests and cases of hepatitis and hepatic failure requiring liver transplantation have been reported with prophylactic use.

( ) • 5.3 MALARONE has not been evaluated for the treatment of cerebral malaria or other severe manifestations of complicated malaria.

Patients with severe malaria are not candidates for oral therapy.

( ) • 5.4 5.1 Vomiting and Diarrhea Absorption of atovaquone may be reduced in patients with diarrhea or vomiting.

If MALARONE is used in patients who are vomiting, parasitemia should be closely monitored and the use of an antiemetic considered.

Vomiting occurred in up to 19% of pediatric patients given treatment doses of MALARONE.

In the controlled clinical trials, 15.3% of adults received an antiemetic when they received atovaquone/proguanil and 98.3% of these patients were successfully treated.

In patients with severe or persistent diarrhea or vomiting, alternative antimalarial therapy may be required.

[See Dosage and Administration (2).] 5.2 Relapse of Infection In mixed and infections, parasite relapse occurred commonly when patients were treated with MALARONE alone.

P.

falciparum Plasmodium vivax P.

vivax In the event of recrudescent infections after treatment with MALARONE or failure of chemoprophylaxis with MALARONE, patients should be treated with a different blood schizonticide.

P.

falciparum 5.3 Hepatotoxicity Elevated liver laboratory tests and cases of hepatitis and hepatic failure requiring liver transplantation have been reported with prophylactic use of MALARONE.

5.4 Severe or Complicated Malaria MALARONE has not been evaluated for the treatment of cerebral malaria or other severe manifestations of complicated malaria, including hyperparasitemia, pulmonary edema, or renal failure.

Patients with severe malaria are not candidates for oral therapy.

INFORMATION FOR PATIENTS

17 PATIENT COUNSELING INFORMATION Patients should be instructed: to take MALARONE at the same time each day with food or a milky drink.

• to take a repeat dose of MALARONE if vomiting occurs within 1 hour after dosing.

• to take a dose as soon as possible if a dose is missed, then return to their normal dosing schedule.

However, if a dose is skipped, the patient should not double the next dose.

• that rare serious adverse events such as hepatitis, severe skin reactions, neurological, and hematological events have been reported when MALARONE was used for the prophylaxis or treatment of malaria.

• to consult a healthcare professional regarding alternative forms of prophylaxis if prophylaxis with MALARONE is prematurely discontinued for any reason.

• that protective clothing, insect repellents, and bednets are important components of malaria prophylaxis.

• that no chemoprophylactic regimen is 100% effective; therefore, patients should seek medical attention for any febrile illness that occurs during or after return from a malaria‑endemic area and inform their healthcare professional that they may have been exposed to malaria.

• that falciparum malaria carries a higher risk of death and serious complications in pregnant women than in the general population.

Pregnant women anticipating travel to malarious areas should discuss the risks and benefits of such travel with their physicians.

• GlaxoSmithKline Research Triangle Park, NC 27709 ©2013, GlaxoSmithKline.

All rights reserved.

MLR:6PI

DOSAGE AND ADMINISTRATION

2 The daily dose should be taken at the same time each day with food or a milky drink.

In the event of vomiting within 1 hour after dosing, a repeat dose should be taken.

MALARONE may be crushed and mixed with condensed milk just prior to administration to patients who may have difficulty swallowing tablets.

MALARONE should be taken with food or a milky drink.

• Prophylaxis ( ): 2.1 Start prophylaxis 1 or 2 days before entering a malaria‑endemic area and continue daily during the stay and for 7 days after return.

• Adults: One adult strength tablet per day.

• Pediatric Patients: Dosage based on body weight (see Table 1).

• Treatment ( ): 2.2 Adults: Four adult strength tablets as a single daily dose for 3 days.

• Pediatric Patients: Dosage based on body weight (see Table 2).

• Renal Impairment ): (2.3 Do not use for prophylaxis of malaria in patients with severe renal impairment.

• Use with caution for treatment of malaria in patients with severe renal impairment.

• 2.1 Prevention of Malaria Start prophylactic treatment with MALARONE 1 or 2 days before entering a malaria‑endemic area and continue daily during the stay and for 7 days after return.

One MALARONE Tablet (adult strength = 250 mg atovaquone/100 mg proguanil hydrochloride) per day.

Adults: The dosage for prevention of malaria in pediatric patients is based upon body weight (Table 1).

Pediatric Patients: Table 1.

Dosage for Prevention of Malaria in Pediatric Patients Weight (kg) Atovaquone/ Proguanil HCl Total Daily Dose Dosage Regimen 11-20 62.5 mg/25 mg 1 MALARONE Pediatric Tablet daily 21-30 125 mg/50 mg 2 MALARONE Pediatric Tablets as a single daily dose 31-40 187.5 mg/75 mg 3 MALARONE Pediatric Tablets as a single daily dose >40 250 mg/100 mg 1 MALARONE Tablet (adult strength) as a single daily dose 2.2 Treatment of Acute Malaria Four MALARONE Tablets (adult strength; total daily dose 1 g atovaquone/400 mg proguanil hydrochloride) as a single daily dose for 3 consecutive days.

Adults: The dosage for treatment of acute malaria in pediatric patients is based upon body weight (Table 2).

Pediatric Patients: Table 2.

Dosage for Treatment of Acute Malaria in Pediatric Patients Weight (kg) Atovaquone/ Proguanil HCl Total Daily Dose Dosage Regimen 5-8 125 mg/50 mg 2 MALARONE Pediatric Tablets daily for 3 consecutive days 9-10 187.5 mg/75 mg 3 MALARONE Pediatric Tablets daily for 3 consecutive days 11-20 250 mg/100 mg 1 MALARONE Tablet (adult strength) daily for 3 consecutive days 21-30 500 mg/200 mg 2 MALARONE Tablets (adult strength) as a single daily dose for 3 consecutive days 31-40 750 mg/300 mg 3 MALARONE Tablets (adult strength) as a single daily dose for 3 consecutive days >40 1 g/400 mg 4 MALARONE Tablets (adult strength) as a single daily dose for 3 consecutive days 2.3 Renal Impairment Do not use MALARONE for malaria prophylaxis in patients with severe renal impairment (creatinine clearance <30 mL/min) .

Use with caution for the treatment of malaria in patients with severe renal impairment, only if the benefits of the 3-day treatment regimen outweigh the potential risks associated with increased drug exposure.

No dosage adjustments are needed in patients with mild (creatinine clearance 50 to 80 mL/min) or moderate (creatinine clearance 30 to 50 mL/min) renal impairment.

[see Contraindications (4.2)] [See Clinical Pharmacology (12.3).]

Insulin Glargine 100 UNT/ML Injectable Solution [Lantus]

DRUG INTERACTIONS

A number of drugs affect glucose metabolism and may require insulin dose adjustment and particularly close monitoring.

The following are examples of drugs that may increase the blood-glucose-lowering effect of insulins including LANTUS and, therefore, increase the susceptibility to hypoglycemia: oral anti-diabetic products, pramlintide, angiotensin converting enzyme (ACE) inhibitors, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, propoxyphene, pentoxifylline, salicylates, somatostatin analogs, and sulfonamide antibiotics.

The following are examples of drugs that may reduce the blood-glucose-lowering effect of insulins including LANTUS: corticosteroids, niacin, danazol, diuretics, sympathomimetic agents (e.g., epinephrine, albuterol, terbutaline), glucagon, isoniazid, phenothiazine derivatives, somatropin, thyroid hormones, estrogens, progestogens (e.g., in oral contraceptives), protease inhibitors and atypical antipsychotic medications (e.g.

olanzapine and clozapine).

Beta-blockers, clonidine, lithium salts, and alcohol may either potentiate or weaken the blood-glucose-lowering effect of insulin.

Pentamidine may cause hypoglycemia, which may sometimes be followed by hyperglycemia.

The signs of hypoglycemia may be reduced or absent in patients taking sympatholytic drugs such as beta-blockers, clonidine, guanethidine, and reserpine.

OVERDOSAGE

An excess of insulin relative to food intake, energy expenditure, or both may lead to severe and sometimes prolonged and life-threatening hypoglycemia.

Mild episodes of hypoglycemia can usually be treated with oral carbohydrates.

Adjustments in drug dosage, meal patterns, or exercise may be needed.

More severe episodes of hypoglycemia with coma, seizure, or neurologic impairment may be treated with intramuscular/subcutaneous glucagon or concentrated intravenous glucose.

After apparent clinical recovery from hypoglycemia, continued observation and additional carbohydrate intake may be necessary to avoid recurrence of hypoglycemia.

DESCRIPTION

LANTUS (insulin glargine [rDNA origin] injection) is a sterile solution of insulin glargine for use as a subcutaneous injection.

Insulin glargine is a recombinant human insulin analog that is a long-acting (up to 24-hour duration of action), parenteral blood-glucose-lowering agent [ See Clinical Pharmacology (12) ].

LANTUS is produced by recombinant DNA technology utilizing a non-pathogenic laboratory strain of Escherichia coli (K12) as the production organism.

Insulin glargine differs from human insulin in that the amino acid asparagine at position A21 is replaced by glycine and two arginines are added to the C-terminus of the B-chain.

Chemically, insulin glargine is 21 A -Gly-30 B a-L-Arg-30 B b-L-Arg-human insulin and has the empirical formula C 267 H 404 N 72 O 78 S 6 and a molecular weight of 6063.

Insulin glargine has the following structural formula: LANTUS consists of insulin glargine dissolved in a clear aqueous fluid.

Each milliliter of LANTUS (insulin glargine injection) contains 100 Units (3.6378 mg) insulin glargine.

The 10 mL vial presentation contains the following inactive ingredients per mL: 30 mcg zinc, 2.7 mg m-cresol, 20 mg glycerol 85%, 20 mcg polysorbate 20, and water for injection.

The 3 mL cartridge presentation contains the following inactive ingredients per mL: 30 mcg zinc, 2.7 mg m-cresol, 20 mg glycerol 85%, and water for injection.

The pH is adjusted by addition of aqueous solutions of hydrochloric acid and sodium hydroxide.

LANTUS has a pH of approximately 4.

MM1

CLINICAL STUDIES

The safety and effectiveness of LANTUS given once-daily at bedtime was compared to that of once-daily and twice-daily NPH insulin in open-label, randomized, active-controlled, parallel studies of 2,327 adult patients and 349 pediatric patients with type 1 diabetes mellitus and 1,563 adult patients with type 2 diabetes mellitus (see Tables 8–11), whose primary efficacy aim was the assessment of effects on blood glucose, as measured by HbA1c.

In general, the reduction in glycated hemoglobin (HbA1c) with LANTUS was similar to that with NPH insulin.

The overall rates of hypoglycemia did not differ between patients with diabetes treated with LANTUS compared to NPH insulin [See Adverse Reactions (6.1) ] .

In the 12,537-participants, 6 to 7 year ORIGIN trial LANTUS was compared to standard glycemic management (largely non-insulin) in reducing cardiovascular (CV) risk as measured by CV outcome events.

Type 1 Diabetes–Adult (see Table 9 ).

In two clinical studies (Studies A and B), patients with type 1 diabetes (Study A; n=585, Study B; n=534) were randomized to 28 weeks of basal-bolus treatment with LANTUS or NPH insulin.

Regular human insulin was administered before each meal.

LANTUS was administered at bedtime.

NPH insulin was administered once daily at bedtime or in the morning and at bedtime when used twice daily.

In another clinical study (Study C), patients with type 1 diabetes (n=619) were randomized to 16 weeks of basal-bolus treatment with LANTUS or NPH insulin.

Insulin lispro was used before each meal.

LANTUS was administered once daily at bedtime and NPH insulin was administered once or twice daily.

In these 3 studies, LANTUS and NPH insulin had similar effects on HbA1c (Table 9) with a similar overall rate of hypoglycemia [See Adverse Reactions (6.1) ] .

Table 9: Type 1 Diabetes Mellitus–Adult Study A Study B Study C Treatment duration Treatment in combination with 28 weeks Regular insulin 28 weeks Regular insulin 16 weeks Insulin lispro LANTUS NPH LANTUS NPH LANTUS NPH Number of subjects treated 292 293 264 270 310 309 HbA1c Baseline HbA1c 8.0 8.0 7.7 7.7 7.6 7.7 Adj.

mean change from baseline +0.2 +0.1 -0.2 -0.2 -0.1 -0.1 LANTUS – NPH +0.1 +0.1 0.0 95% CI for Treatment difference (0.0; +0.2) (-0.1; +0.2) (-0.1; +0.1) Basal insulin dose Baseline mean 21 23 29 29 28 28 Mean change from baseline -2 0 -4 +2 -5 +1 Total insulin dose Baseline mean 48 52 50 51 50 50 Mean change from baseline -1 0 0 +4 -3 0 Fasting blood glucose (mg/dL) Baseline mean 167 166 166 175 175 173 Adj.

mean change from baseline -21 -16 -20 -17 -29 -12 Body weight (kg) Baseline mean 73.2 74.8 75.5 75.0 74.8 75.6 Mean change from baseline 0.1 -0.0 0.7 1.0 0.1 0.5 Type 1 Diabetes–Pediatric (see Table 10 ).

In a randomized, controlled clinical study (Study D), pediatric patients (age range 6 to 15 years) with type 1 diabetes (n=349) were treated for 28 weeks with a basal-bolus insulin regimen where regular human insulin was used before each meal.

LANTUS was administered once daily at bedtime and NPH insulin was administered once or twice daily.

Similar effects on HbA1c (Table 10) and the incidence of hypoglycemia were observed in both treatment groups [See Adverse Reactions (6.1) ] .

Table 10: Type 1 Diabetes Mellitus–Pediatric Study D Treatment duration 28 weeks Treatment in combination with Regular insulin LANTUS NPH Number of subjects treated 174 175 HbA1c Baseline mean 8.5 8.8 Adj.

mean change from baseline +0.3 +0.3 LANTUS – NPH 0.0 95% CI for Treatment difference (-0.2; +0.3) Basal insulin dose Baseline mean 19 19 Mean change from baseline -1 +2 Total insulin dose Baseline mean 43 43 Mean change from baseline +2 +3 Fasting blood glucose (mg/dL) Baseline mean 194 191 Adj.

mean change from baseline -23 -12 Body weight (kg) Baseline mean 45.5 44.6 Mean change from baseline 2.2 2.5 Type 2 Diabetes–Adult (see Table 11 ).

In a randomized, controlled clinical study (Study E) (n=570), LANTUS was evaluated for 52 weeks in combination with oral anti-diabetic medications (a sulfonylurea, metformin, acarbose, or combinations of these drugs).

LANTUS administered once daily at bedtime was as effective as NPH insulin administered once daily at bedtime in reducing HbA1c and fasting glucose (Table 11).

The rate of hypoglycemia was similar in LANTUS and NPH insulin treated patients [See Adverse Reactions (6.1) ] .

In a randomized, controlled clinical study (Study F), in patients with type 2 diabetes not using oral anti-diabetic medications (n=518), a basal-bolus regimen of LANTUS once daily at bedtime or NPH insulin administered once or twice daily was evaluated for 28 weeks.

Regular human insulin was used before meals, as needed.

LANTUS had similar effectiveness as either once- or twice-daily NPH insulin in reducing HbA1c and fasting glucose (Table 11) with a similar incidence of hypoglycemia [See Adverse Reactions (6.1) ] .

In a randomized, controlled clinical study (Study G), patients with type 2 diabetes were randomized to 5 years of treatment with once-daily LANTUS or twice-daily NPH insulin.

For patients not previously treated with insulin, the starting dose of LANTUS or NPH insulin was 10 units daily.

Patients who were already treated with NPH insulin either continued on the same total daily NPH insulin dose or started LANTUS at a dose that was 80% of the total previous NPH insulin dose.

The primary endpoint for this study was a comparison of the progression of diabetic retinopathy by 3 or more steps on the Early Treatment Diabetic Retinopathy Study (ETDRS) scale.

HbA1c change from baseline was a secondary endpoint.

Similar glycemic control in the 2 treatment groups was desired in order to not confound the interpretation of the retinal data.

Patients or study personnel used an algorithm to adjust the LANTUS and NPH insulin doses to a target fasting plasma glucose ≤100 mg/dL.

After the LANTUS or NPH insulin dose was adjusted, other anti-diabetic agents, including pre-meal insulin were to be adjusted or added.

The LANTUS group had a smaller mean reduction from baseline in HbA1c compared to the NPH insulin group, which may be explained by the lower daily basal insulin doses in the LANTUS group (Table 11).

Both treatment groups had a similar incidence of reported symptomatic hypoglycemia.

The incidences of severe symptomatic hypoglycemia are given in Table 6 [See Adverse Reactions (6.1) ] .

Table 11: Type 2 Diabetes Mellitus–Adult Study E Study F Study G Treatment duration 52 weeks 28 weeks 5 years Treatment in combination with Oral agents Regular insulin Regular insulin LANTUS NPH LANTUS NPH LANTUS NPH Number of subjects treated 289 281 259 259 513 504 HbA1c Baseline mean 9.0 8.9 8.6 8.5 8.4 8.3 Adj.

mean change from baseline -0.5 -0.4 -0.4 -0.6 -0.6 -0.8 LANTUS – NPH -0.1 +0.2 +0.2 95% CI for Treatment difference (-0.3; +0.1) (0.0; +0.4) (+0.1, +0.4) Basal insulin dose * Baseline mean 14 15 44.1 45.5 39 44 Mean change from baseline +12 +9 -1 +7 +23 +30 Total insulin dose Baseline mean 14 15 64 67 48 53 Mean change from baseline +12 +9 +10 +13 +41 +40 Fasting blood glucose (mg/dL) Baseline mean 179 180 164 166 190 180 Adj.

mean change from baseline -49 -46 -24 -22 -45 -44 Body weight (kg) Baseline mean 83.5 82.1 89.6 90.7 100 99 Adj.

mean change from baseline 2.0 1.9 0.4 1.4 3.7 4.8 In Study G, the baseline dose of basal or total insulin was the first available on-treatment dose prescribed during the study (on visit month 1.5).

The ORIGIN (Outcome Reduction with Initial Glargine INtervention) trial was a, international, multicenter, randomized, 2×2 factorial design study conducted in 12,537 participants with impaired fasting glucose (IFG), impaired glucose tolerance (IGT) or early type 2 diabetes mellitus and evidence of CV disease.

Participants were randomized to receive LANTUS (n=6264), titrated to a FPG of 95 mg/dL (5.3mM) or less, or Standard Care (n=6273).

At baseline participants had a mean age of 63.5 years, mean duration of diabetes of 5.8 years in those with pre-existing diabetes, and median HbA1c of 6.4%.

Median duration of follow-up was approximately 6.2 years.

At the end of the trial 81% of participants randomized to take LANTUS were still on treatment.

Median on-treatment HbA1c values ranged from 5.9 to 6.4 % in the LANTUS group, and 6.2% to 6.6% in the Standard Care group throughout the duration of follow-up.

Median FPG in the LANTUS group was at target (≤95mg/dL) following dose titration for the duration of the study.

The incidences of severe symptomatic hypoglycemia are given in Table 7 [See Adverse Reactions (6.1) ] .

The median of the change in body weight from baseline to the last on-treatment visit was 2.2 kg greater in the Lantus group than in the Standard Care group.

The primary objective of this trial was to examine the effect of LANTUS on two co-primary composite efficacy outcomes.

The first one was the time to the first occurrence of CV death, nonfatal myocardial infarction (MI), or nonfatal stroke, and the second one was the time to the first occurrence of any of the first co-primary events, or revascularization procedure (cardiac, carotid, or peripheral), or hospitalization for heart failure.

Secondary endpoints were: all-cause mortality a composite microvascular outcome development of type 2 diabetes, in participants with IGT and/or IFG at baseline The primary and secondary outcome results, as well as the results for each component of the coprimary outcomes, are displayed in the two tables (table 12 for the time-to-event analyses, and, for the non-time-to-event analysis of development of diabetes, table 13) below.

Table 12: ORIGIN: Time to Onset of each Primary and Secondary Endpoint LANTUS N=6264 Standard care N=6273 Lantus vs Standard care Participants with Events N (%) Participants with Events N (%) Hazard Ratio (95% CI) Primary endpoints CV death, nonfatal myocardial infarction (MI), or nonfatal stroke 1041 (16.6) 1013 (16.1) 1.02 (0.94, 1.11) CV death, nonfatal myocardial infarction (MI), or nonfatal stroke, or hospitalization for heart failure or revascularization procedure 1792 (28.6) 1727 (27.5) 1.04 (0.97, 1.11) Secondary endpoints All-cause mortality 951 (15.2) 965 (15.4) 0.98 (0.90, 1.08) Composite microvascular outcome * 1323 (21.1) 1363 (21.7) 0.97 (0.90, 1.05) Components of coprimary endpoint CV death 580 (9.3) 576 (9.2) 1.00 (0.89, 1.13) MI (fatal or non-fatal) 336 (5.4) 326 (5.2) 1.03 (0.88, 1.19) stroke(fatal or non-fatal) 331 (5.3) 319 (5.1) 1.03 (0.89, 1.21) Revascularizations 908 (14.5) 860 (13.7) 1.06 (0.96, 1.16) Hospitalization for heart failure 310 (4.9) 343 (5.5) 0.90 (0.77, 1.05) with components of: laser photocoagulation or vitrectomy or blindness for diabetic retinopathy; progression in albuminuria; or doubling of serum creatinine or development of the need for renal replacement therapy Table 13: Incidence Rate of Diabetes by end of study OGTT * Treatment (N) LANTUS (6264) Standard Care (6273) Number of Participants † 737 719 # participants who developed diabetes (%) 182 (24.7) 224 (31.2) Odds Ratio (95% CI) 0.72 (0.58 to 0.91) End of study OGTT was performed 3–4 weeks after discontinuing LANTUS Participants with prediabetes (IFG or IGT) at baseline, based on an OGTT performed then; There were no statistical significant differences between treatment groups in the overall incidence of cancer (all types combined) or death from cancer.

The time to first event of any cancer or new cancer during the study was similar between the two treatment groups with respective hazard ratios of 0.99 (0.88, 1.11) and 0.96 (0.85, 1.09).

Participation in ORIGIN for a median of approximately 6.2 years showed that treatment with Lantus did not alter the risk for cardiovascular outcomes, all-cause mortality or cancer, when compared to standard glucose lowering therapy.

In addition, metabolic control was maintained at a lower level of glycemia, with a decrease in the percentage of participants developing diabetes, at a cost of a modest increase in hypoglycemia and weight gain.

LANTUS Timing of Daily Dosing (see Table 14 ).

The safety and efficacy of LANTUS administered pre-breakfast, pre-dinner, or at bedtime were evaluated in a randomized, controlled clinical study in patients with type 1 diabetes (study H, n=378).

Patients were also treated with insulin lispro at mealtime.

LANTUS administered at different times of the day resulted in similar reductions in HbA1c compared to that with bedtime administration (see Table 11 ).

In these patients, data are available from 8-point home glucose monitoring.

The maximum mean blood glucose was observed just prior to injection of LANTUS regardless of time of administration.

In this study, 5% of patients in the LANTUS-breakfast arm discontinued treatment because of lack of efficacy.

No patients in the other two arms discontinued for this reason.

The safety and efficacy of LANTUS administered pre-breakfast or at bedtime were also evaluated in a randomized, active-controlled clinical study (Study I, n=697) in patients with type 2 diabetes not adequately controlled on oral anti-diabetic therapy.

All patients in this study also received glimepiride 3 mg daily.

LANTUS given before breakfast was at least as effective in lowering HbA1c as LANTUS given at bedtime or NPH insulin given at bedtime (see Table 12 ).

Table 14: LANTUS Timing of Daily Dosing in Type 1 (Study H) and Type 2 (Study I) Diabetes Mellitus Study H Study I Treatment duration 24 weeks 24 weeks Treatment in combination with: Insulin lispro Glimepiride LANTUS Breakfast LANTUS Dinner LANTUS Bedtime LANTUS Breakfast LANTUS Bedtime NPH Bedtime Number of subjects treated * 112 124 128 234 226 227 HbA1c Baseline mean 7.6 7.5 7.6 9.1 9.1 9.1 Mean change from baseline -0.2 -0.1 0.0 -1.3 -1.0 -0.8 Basal insulin dose (U) Baseline mean 22 23 21 19 20 19 Mean change from baseline 5 2 2 11 18 18 Total insulin dose (U) NA † NA NA Baseline mean 52 52 49 Mean change from baseline 2 3 2 Body weight (kg) Baseline mean 77.1 77.8 74.5 80.7 82 81 Mean change from baseline 0.7 0.1 0.4 3.9 3.7 2.9

HOW SUPPLIED

LANTUS solution for injection 100 units per mL (U-100) is available as: Dosage Unit/Strength Package size NDC # 0088 10 mL vials 100 Units/mL Pack of 1 2220-33 3 mL cartridge system * 100 Units/mL package of 5 2220-52 3 mL SoloStar ® disposable insulin device 100 Units/mL package of 5 2219-05 Cartridge systems are for use only in OptiClik Needles are not included in the packs.

BD Ultra-Fine™ needles 1 to be used in conjunction with SoloStar and OptiClik are sold separately and are manufactured by BD.

The brands listed are the registered trademarks of their respective owners and are not trademarks of sanofi-aventis U.S.

LLC LANTUS should not be stored in the freezer and should not be allowed to freeze.

Discard LANTUS if it has been frozen.

Unopened Vial/Cartridge system/SoloStar disposable insulin device: Unopened LANTUS vials, cartridge systems and SoloStar device should be stored in a refrigerator, 36°F – 46°F (2°C – 8°C).

Discard after the expiration date.

Open (In-Use) Vial: Vials must be discarded 28 days after being opened.

If refrigeration is not possible, the open vial can be kept unrefrigerated for up to 28 days away from direct heat and light, as long as the temperature is not greater than 86°F (30°C).

Open (In-Use) Cartridge system: The opened (in-use) cartridge system in OptiClik should NOT be refrigerated but should be kept at room temperature (below 86°F [30°C]) away from direct heat and light.

The opened (in-use) cartridge system in OptiClik must be discarded 28 days after being opened.

Do not store OptiClik , with or without cartridge system, in a refrigerator at any time.

Open (In-Use) SoloStar disposable insulin device: The opened (in-use) SoloStar should NOT be refrigerated but should be kept at room temperature (below 86°F [30°C]) away from direct heat and light.

The opened (in-use) SoloStar device must be discarded 28 days after being opened.

These storage conditions are summarized in the following table: Not in-use (unopened) Refrigerated Not in-use (unopened) Room Temperature In-use (opened) (See Temperature Below) 10 mL Vial Until expiration date 28 days 28 days Refrigerated or room temperature 3 mL Cartridge system Until expiration date 28 days 28 days Refrigerated or room temperature 3 mL Cartridge system inserted into OptiClik ® 28 days Room temperature only (Do not refrigerate) 3 mL SoloStar ® disposable insulin device Until expiration date 28 days 28 days Room temperature only (Do not refrigerate) Parenteral drug products should be inspected visually prior to administration whenever the solution and the container permit.

LANTUS must only be used if the solution is clear and colorless with no particles visible.

Mixing and diluting: LANTUS must NOT be diluted or mixed with any other insulin or solution [S ee Warnings and Precautions (5.2) ] .

Vial: The syringes must not contain any other medicinal product or residue.

Cartridge system/SoloStar : If OptiClik, the Insulin Delivery Device used with the LANTUS cartridge system, or SoloStar disposable insulin device, malfunctions, LANTUS may be drawn from the cartridge system or from SoloStar into a U-100 syringe and injected.

DOSAGE FORMS AND STRENGTHS

DOSAGE FORMS & STRENGTHS LANTUS solution for injection 100 Units per mL is available as: -10 mL Vial (1000 Units/10 mL)-3 mL Cartridge systems for use only in OptiClik ® (300 Units/3 mL)-3 mL SoloStar ® disposable insulin device (300 Units/3 mL)

INDICATIONS AND USAGE

INDICATIONS & USAGE LANTUS is indicated to improve glycemic control in adults and children with type 1 diabetes mellitus and in adults with type 2 diabetes mellitus.

Important Limitations of Use: LANTUS is not recommended for the treatment of diabetic ketoacidosis.

Intravenous short-acting insulin is the preferred treatment for this condition.

WARNING AND CAUTIONS

WARNINGS AND PRECAUTIONS Dose adjustment and monitoring: Monitor blood glucose in all patients treated with insulin.

Insulin regimens should be modified cautiously and only under medical supervision ( 5.1 ) Administration: Do not dilute or mix with any other insulin or solution.

Do not administer subcutaneously via an insulin pump or intravenously because severe hypoglycemia can occur ( 5.2 ) Do not share reusable or disposable insulin devices or needles between patients ( 5.2 ) Hypoglycemia: Most common adverse reaction of insulin therapy and may be life-threatening ( 5.3 , 6.1 ) Allergic reactions: Severe, life-threatening, generalized allergy, including anaphylaxis, can occur ( 5.4 , 6.1 ) Renal or hepatic impairment: May require a reduction in the LANTUS dose ( 5.5 , 5.6 ) Glucose monitoring is essential for all patients receiving insulin therapy.

Changes to an insulin regimen should be made cautiously and only under medical supervision.

Changes in insulin strength, manufacturer, type, or method of administration may result in the need for a change in insulin dose or an adjustment in concomitant oral anti-diabetic treatment.

As with all insulin preparations, the time course of action for LANTUS may vary in different individuals or at different times in the same individual and is dependent on many conditions, including the local blood supply, local temperature, and physical activity.

Do not administer LANTUS intravenously or via an insulin pump.

The intended duration of activity of LANTUS is dependent on injection into subcutaneous tissue Intravenous administration of the usual subcutaneous dose could result in severe hypoglycemia [see Warnings and Precautions (5.3) ] .

Do not dilute or mix LANTUS with any other insulin or solution.

If LANTUS is diluted or mixed, the solution may become cloudy, and the pharmacokinetic or pharmacodynamic profile (e.g., onset of action, time to peak effect) of LANTUS and the mixed insulin may be altered in an unpredictable manner.

When LANTUS and regular human insulin were mixed immediately before injection in dogs, a delayed onset of action and a delayed time to maximum effect for regular human insulin was observed.

The total bioavailability of the mixture was also slightly decreased compared to separate injections of LANTUS and regular human insulin.

The relevance of these observations in dogs to humans is unknown.

Do not share disposable or reusable insulin devices or needles between patients, because doing so carries a risk for transmission of blood-borne pathogens.

Hypoglycemia is the most common adverse reaction of insulin, including LANTUS.

The risk of hypoglycemia increases with intensive glycemic control.

Patients must be educated to recognize and manage hypoglycemia.

Severe hypoglycemia can lead to unconsciousness or convulsions and may result in temporary or permanent impairment of brain function or death.

Severe hypoglycemia requiring the assistance of another person or parenteral glucose infusion or glucagon administration has been observed in clinical trials with insulin, including trials with LANTUS.

The timing of hypoglycemia usually reflects the time-action profile of the administered insulin formulations.

Other factors such as changes in food intake (e.g., amount of food or timing of meals), exercise, and concomitant medications may also alter the risk of hypoglycemia [ See Drug Interactions (7) ].

The prolonged effect of subcutaneous LANTUS may delay recovery from hypoglycemia.

Patients being switched from twice daily NPH insulin to once-daily LANTUS should have their initial LANTUS dose reduced by 20% from the previous total daily NPH dose to reduce the risk of hypoglycemia [see Dosage and Administration (2.3) ].

As with all insulins, use caution in patients with hypoglycemia unawareness and in patients who may be predisposed to hypoglycemia (e.g., the pediatric population and patients who fast or have erratic food intake).

The patient’s ability to concentrate and react may be impaired as a result of hypoglycemia.

This may present a risk in situations where these abilities are especially important, such as driving or operating other machinery.

Early warning symptoms of hypoglycemia may be different or less pronounced under certain conditions, such as longstanding diabetes, diabetic neuropathy, use of medications such as beta-blockers, or intensified glycemic control.

These situations may result in severe hypoglycemia (and, possibly, loss of consciousness) prior to the patient’s awareness of hypoglycemia.

Severe, life-threatening, generalized allergy, including anaphylaxis, can occur with insulin products, including LANTUS.

Due to its long duration of action, Lantus is not recommended during periods of rapidly declining renal function because of the risk for prolonged hypoglycemia.

Although studies have not been performed in patients with diabetes and renal impairment, a reduction in the LANTUS dose may be required in patients with renal impairment because of reduced insulin metabolism, similar to observations found with other insulins.

[See Clinical Pharmacology (12.3) ].

Due to its long duration of action, Lantus is not recommended during periods of rapidly declining hepatic function because of the risk for prolonged hypoglycemia.

Although studies have not been performed in patients with diabetes and hepatic impairment, a reduction in the LANTUS dose may be required in patients with hepatic impairment because of reduced capacity for gluconeogenesis and reduced insulin metabolism, similar to observations found with other insulins.

[See Clinical Pharmacology (12.3) ].

Some medications may alter insulin requirements and subsequently increase the risk for hypoglycemia or hyperglycemia [See Drug Interactions (7) ].

INFORMATION FOR PATIENTS

Patients should be informed that changes to insulin regimens must be made cautiously and only under medical supervision.

Patients should be informed about the potential side effects of insulin therapy, including lipodystrophy (and the need to rotate injection sites within the same body region), weight gain, allergic reactions, and hypoglycemia.

Patients should be informed that the ability to concentrate and react may be impaired as a result of hypoglycemia.

This may present a risk in situations where these abilities are especially important, such as driving or operating other machinery.

Patients who have frequent hypoglycemia or reduced or absent warning signs of hypoglycemia should be advised to use caution when driving or operating machinery.

Accidental mix-ups between LANTUS and other insulins, particularly short-acting insulins, have been reported.

To avoid medication errors between LANTUS and other insulins, patients should be instructed to always check the insulin label before each injection.

LANTUS must only be used if the solution is clear and colorless with no particles visible .

Patients must be advised that LANTUS must NOT be diluted or mixed with any other insulin or solution .

Patients should be advised not to share disposable or reusable insulin devices or needles with other patients, because doing so carries a risk for transmission of blood-borne pathogens.

Patients should be instructed on self-management procedures including glucose monitoring, proper injection technique, and management of hypoglycemia and hyperglycemia.

Patients must be instructed on handling of special situations such as intercurrent conditions (illness, stress, or emotional disturbances), an inadequate or skipped insulin dose, inadvertent administration of an increased insulin dose, inadequate food intake, and skipped meals.

Patients with diabetes should be advised to inform their health care professional if they are pregnant or are contemplating pregnancy.

Refer patients to the LANTUS “Patient Information” for additional information.

See attached document at end of Full Prescribing Information.

DOSAGE AND ADMINISTRATION

DOSAGE & ADMINISTRATION The starting dose should be individualized based on the type of diabetes and whether the patient is insulin-naïve ( 2.1 , 2.2 , 2.3 ) Administer subcutaneously once daily at any time of day, but at the same time every day.

( 2.1 ) Rotate injection sites within an injection area (abdomen, thigh, or deltoid) to reduce the risk of lipodystrophy.

( 2.1 ) Converting from other insulin therapies may require adjustment of timing and dose of LANTUS.

Closely monitor glucoses especially upon converting to LANTUS and during the initial weeks thereafter.

( 2.3 ) LANTUS is a recombinant human insulin analog for once daily subcutaneous administration with potency that is approximately the same as the potency of human insulin.

LANTUS exhibits a relatively constant glucose-lowering profile over 24 hours that permits once-daily dosing.

LANTUS may be administered at any time during the day.

LANTUS should be administered subcutaneously once a day at the same time every day.

The dose of LANTUS must be individualized based on clinical response.

Blood glucose monitoring is essential in all patients receiving insulin therapy.

Patients adjusting the amount or timing of dosing with LANTUS, should only do so under medical supervision with appropriate glucose monitoring [see Warnings and Precautions (5.1) .] In patients with type 1 diabetes, LANTUS must be used in regimens with short-acting insulin.

The intended duration of activity of LANTUS is dependent on injection into subcutaneous tissue [see Clinical pharmacology (12.2) ] .

LANTUS should not be administered intravenously or via an insulin pump.

Intravenous administration of the usual subcutaneous dose could result in severe hypoglycemia [see Warnings and Precautions (5.3) ] .

As with all insulins, injection sites should be rotated within the same region (abdomen, thigh, or deltoid) from one injection to the next to reduce the risk of lipodystrophy [See Adverse Reactions (6.1) ].

In clinical studies, there was no clinically relevant difference in insulin glargine absorption after abdominal, deltoid, or thigh subcutaneous administration.

As for all insulins, the rate of absorption, and consequently the onset and duration of action, may be affected by exercise and other variables, such as stress, intercurrent illness, or changes in co-administered drugs or meal patterns .

The recommended starting dose of LANTUS in patients with type 1 diabetes should be approximately one-third of the total daily insulin requirements.

Short-acting, premeal insulin should be used to satisfy the remainder of the daily insulin requirements.

The recommended starting dose of LANTUS in patients with type 2 diabetes who are not currently treated with insulin is 10 units (or 0.2 Units/kg) once daily, which should subsequently be adjusted to the patient’s needs.

The dose of LANTUS should be adjusted according to blood glucose measurements.

The dosage of LANTUS should be individualized under the supervision of a healthcare provider in accordance with the needs of the patient.

If changing from a treatment regimen with an intermediate- or long-acting insulin to a regimen with LANTUS, the amount and timing of shorter-acting insulins and doses of any oral anti-diabetic drugs may need to be adjusted.

If transferring patients from once-daily NPH insulin to once-daily LANTUS, the recommended initial LANTUS dose is the same as the dose of NPH that is being discontinued.

If transferring patients from twice-daily NPH insulin to once-daily LANTUS, the recommended initial LANTUS dose is 80% of the total NPH dose that is being discontinued.

This dose reduction will lower the likelihood of hypoglycemia [ see Warnings and Precautions (5.3) ].

nifedipine 90 MG Osmotic 24 HR Extended Release Oral Tablet

WARNINGS

Excessive Hypotension Although in most angina patients the hypotensive effect of nifedipine is modest and well tolerated, occasional patients have had excessive and poorly tolerated hypotension.

These responses have usually occurred during initial titration or at the time of subsequent upward dosage adjustment, and may be more likely in patients on concomitant beta-blockers.

Severe hypotension and/or increased fluid volume requirements have been reported in patients receiving nifedipine together with a beta-blocking agent who underwent coronary artery bypass surgery using high dose fentanyl anesthesia.

The interaction with high dose fentanyl appears to be due to the combination of nifedipine and a beta-blocker, but the possibility that it may occur with nifedipine alone, with low doses of fentanyl, in other surgical procedures, or with other narcotic analgesics cannot be ruled out.

In nifedipine-treated patients where surgery using high dose fentanyl anesthesia is contemplated, the physician should be aware of these potential problems and if the patient’s condition permits, sufficient time (at least 36 hours) should be allowed for nifedipine to be washed out of the body prior to surgery.

The following information should be taken into account in those patients who are being treated for hypertension as well as angina: Increased Angina and/or Myocardial Infarction Rarely, patients, particularly those who have severe obstructive coronary artery disease, have developed well documented increased frequency, duration and/or severity of angina or acute myocardial infarction on starting nifedipine or at the time of dosage increase.

The mechanism of this effect is not established.

Beta-Blocker Withdrawal It is important to taper beta-blockers if possible, rather than stopping them abruptly before beginning nifedipine.

Patients recently withdrawn from beta-blockers may develop a withdrawal syndrome with increased angina, probably related to increased sensitivity to catecholamines.

Initiation of nifedipine treatment will not prevent this occurrence and on occasion has been reported to increase it.

Congestive Heart Failure Rarely, patients, usually receiving a beta-blocker, have developed heart failure after beginning nifedipine.

Patients with tight aortic stenosis may be at greater risk for such an event, as the unloading effect of nifedipine would be expected to be of less benefit to those patients, owing to their fixed impedance to flow across the aortic valve in these patients.

Gastointestinal Obstruction Requiring Surgery There have been rare reports of obstructive symptoms in patients with known strictures in association with the ingestion of Nifedipine Extended-release Tablets.

Bezoars can occur in very rare cases and may require surgical intervention.

Cases of serious gastrointestinal obstruction have been identified in patients with no known gastrointestinal disease, including the need for hospitalization and surgical intervention.

Risk factors for a gastrointestinal obstruction identified from post-marketing reports of Nifedipine Extended-release Tablets include alteration in gastrointestinal anatomy (e.g., severe gastrointestinal narrowing, colon cancer, small bowel obstruction, bowel resection, gastric bypass, vertical banded gastroplasty, colostomy, diverticulitis, diverticulosis, and inflammatory bowel disease), hypomotility disorders (e.g., constipation, gastroesophageal reflux disease, ileus, obesity, hypothyroidism, and diabetes) and concomitant medications (e.g., H2-histamine blockers, opiates, nonsteroidal anti-inflammatory drugs, laxatives, anticholinergic agents, levothyroxine, and neuromuscular blocking agents).

Gastrointestinal Ulcers Cases of tablet adherence to the gastrointestinal wall with ulceration have been reported, some requiring hospitalization and intervention.

DRUG INTERACTIONS

Drug Interactions Beta-adrenergic blocking agents (See INDICATIONS AND USAGE and WARNINGS .) Experience in over 1400 patients with nifedipine capsules in a noncomparative clinical trial has shown that concomitant administration of nifedipine and beta-blocking agents is usually well tolerated, but there have been occasional literature reports suggesting that the combination may increase the likelihood of congestive heart failure, severe hypotension, or exacerbation of angina.

Long-acting Nitrates Nifedipine may be safely coadministered with nitrates, but there have been no controlled studies to evaluate the antianginal effectiveness of this combination.

Digitalis Administration of nifedipine with digoxin increased digoxin levels in nine of twelve normal volunteers.

The average increase was 45%.

Another investigator found no increase in digoxin levels in thirteen patients with coronary artery disease.

In an uncontrolled study of over two hundred patients with congestive heart failure during which digoxin blood levels were not measured, digitalis toxicity was not observed.

Since there have been isolated reports of patients with elevated digoxin levels, it is recommended that digoxin levels be monitored when initiating, adjusting, and discontinuing nifedipine to avoid possible over- or under-digitalization.

Coumarin Anticoagulants There have been rare reports of increased prothrombin time in patients taking coumarin anticoagulants to whom nifedipine was administered.

However, the relationship to nifedipine therapy is uncertain.

Cimetidine A study in six healthy volunteers has shown a significant increase in peak nifedipine plasma levels (80%) and area-under-the-curve (74%), after a one week course of cimetidine at 1000 mg per day and nifedipine at 40 mg per day.

Ranitidine produced smaller, non-significant increases.

The effect may be mediated by the known inhibition of cimetidine on hepatic cytochrome P-450, the enzyme system probably responsible for the first-pass metabolism of nifedipine.

If nifedipine therapy is initiated in a patient currently receiving cimetidine, cautious titration is advised.

OVERDOSAGE

Experience with nifedipine overdosage is limited.

Generally, overdosage with nifedipine leading to pronounced hypotension calls for active cardiovascular support including monitoring of cardiovascular and respiratory function, elevation of extremities, judicious use of calcium infusion, pressor agents and fluids.

Clearance of nifedipine would be expected to be prolonged in patients with impaired liver function.

Since nifedipine is highly protein-bound, dialysis is not likely to be of any benefit.

There has been one reported case of massive overdosage with Nifedipine Extended-release Tablets.

The main effects of ingestion of approximately 4800 mg of Nifedipine Extended-release Tablets in a young man attempting suicide as a result of cocaine-induced depression was initial dizziness, palpitations, flushing, and nervousness.

Within several hours of ingestion, nausea, vomiting, and generalized edema developed.

No significant hypotension was apparent at presentation, 18 hours post-ingestion.

Electrolyte abnormalities consisted of a mild, transient elevation of serum creatinine, and modest elevations of LDH and CPK, but normal SGOT.

Vital signs remained stable, no electrocardiographic abnormalities were noted and renal function returned to normal within 24 to 48 hours with routine supportive measures alone.

No prolonged sequelae were observed.

The effect of a single 900 mg ingestion of nifedipine capsules in a depressed anginal patient also on tricyclic antidepressants was loss of consciousness within 30 minutes of ingestion, and profound hypotension, which responded to calcium infusion, pressor agents, and fluid replacement.

A variety of ECG abnormalities were seen in this patient with a history of bundle branch block, including sinus bradycardia and varying degrees of AV block.

These dictated the prophylactic placement of a temporary ventricular pacemaker, but otherwise resolved spontaneously.

Significant hyperglycemia was seen initially in this patient, but plasma glucose levels rapidly normalized without further treatment.

A young hypertensive patient with advanced renal failure ingested 280 mg of nifedipine capsules at one time, with resulting marked hypotension responding to calcium infusion and fluids.

No AV conduction abnormalities, arrhythmias, or pronounced changes in heart rate were noted, nor was there any further deterioration in renal function.

DESCRIPTION

Nifedipine is a drug belonging to a class of pharmacological agents known as the calcium channel blockers.

Nifedipine is 3, 5-pyridinedicarboxylic acid, 1, 4-dihydro-2, 6-dimethyl-4-(2-nitrophenyl)-, dimethyl ester, C 17 H 18 N 2 O 6, and has the structural formula: Nifedipine is a yellow crystalline substance, practically insoluble in water but soluble in ethanol.

It has a molecular weight of 346.33.

Nifedipine Extended-release Tablet is formulated as a once-a-day extended-release tablet for oral administration designed to deliver 30, 60, or 90 mg of nifedipine.

Inert ingredients in the formulations are: black iron oxide; cellulose acetate; colloidal silicon dioxide; hypromellose; lactose monohydrate; magnesium stearate; microcrystalline cellulose; polyethylene glycol; polyethylene oxide; polysorbate; povidone; propylene glycol; red ferric oxide; sodium chloride; titanium dioxide; triacetin.

Chemical Structure System Components and Performance Nifedipine Extended-release Tablet is similar in appearance to a conventional tablet.

It consists, however, of a semipermeable membrane surrounding an osmotically active drug core.

As water from the gastrointestinal tract enters the tablet, pressure increases in the core of the tablet, releasing drug through the precision laser-drilled tablet orifice in the one side of the tablet.

Nifedipine Extended-release Tablet is designed to provide nifedipine at an approximately constant rate over 24 hours.

This controlled rate of drug delivery into the gastrointestinal lumen is independent of pH or gastrointestinal motility.

Nifedipine Extended-release Tablet depends for its action on the existence of an osmotic gradient between the contents of the tablet core and fluid in the GI tract.

Drug delivery is essentially constant as long as the osmotic gradient remains constant, and then gradually falls to zero.

Upon swallowing, the biologically inert components of the tablet remain intact during GI transit and are eliminated in the feces as an insoluble shell.

USP Drug Release Test 5.

HOW SUPPLIED

Nifedipine Extended-release Tablets 90 mg are round, biconvex, pink coated tablets imprinted with “KU 262 in black ink.

They are supplied as follows: Bottles of 30 Tablets NDC 33261-0840-30 Store at 20°-25°C (68°-77°F) (See USP Controlled Room Temperature).

Protect from moisture, humidity, and light.

For Medical Information Contact: Medical Affairs Department Phone: (800) 477-7877 Distributed by: Kremers, Urban Pharmaceuticals, Inc.

Princeton, NJ 08540, USA for: logo Wilmington, NC 28405, USA L4759N Repackaged By : Aidarex Pharmaceuticals LLC, Corona, CA 92880 Rev.6E 10/2011 logo

MECHANISM OF ACTION

Mechanism of Action A) Angina The precise mechanisms by which inhibition of calcium influx relieves angina has not been fully determined, but includes at least the following two mechanisms: 1) Relaxation and Prevention of Coronary Artery Spasm Nifedipine dilates the main coronary arteries and coronary arterioles, both in normal and ischemic regions, and is a potent inhibitor of coronary artery spasm, whether spontaneous or ergonovine-induced.

This property increases myocardial oxygen delivery in patients with coronary artery spasm, and is responsible for the effectiveness of nifedipine in vasospastic (Prinzmetal’s or variant) angina.

Whether this effect plays any role in classical angina is not clear, but studies of exercise tolerance have not shown an increase in the maximum exercise rate-pressure product, a widely accepted measure of oxygen utilization.

This suggests that, in general, relief of spasm or dilation of coronary arteries is not an important factor in classical angina.

2) Reduction of Oxygen Utilization Nifedipine regularly reduces arterial pressure at rest and at a given level of exercise by dilating peripheral arterioles and reducing the total peripheral vascular resistance (afterload) against which the heart works.

This unloading of the heart reduces myocardial energy consumption and oxygen requirements, and probably accounts for the effectiveness of nifedipine in chronic stable angina.

B) Hypertension The mechanism by which nifedipine reduces arterial blood pressure involves peripheral arterial vasodilatation and the resulting reduction in peripheral vascular resistance.

The increased peripheral vascular resistance that is an underlying cause of hypertension results from an increase in active tension in the vascular smooth muscle.

Studies have demonstrated that the increase in active tension reflects an increase in cytosolic free calcium.

Nifedipine is a peripheral arterial vasodilator which acts directly on vascular smooth muscle.

The binding of nifedipine to voltage-dependent and possibly receptor-operated channels in vascular smooth muscle results in an inhibition of calcium influx through these channels.

Stores of intracellular calcium in vascular smooth muscle are limited and thus dependent upon the influx of extracellular calcium for contraction to occur.

The reduction in calcium influx by nifedipine causes arterial vasodilation and decreased peripheral vascular resistance which results in reduced arterial blood pressure.

INDICATIONS AND USAGE

I.

Vasospastic Angina Nifedipine Extended-release Tablet is indicated for the management of vasospastic angina confirmed by any of the following criteria: 1) classical pattern of angina at rest accompanied by ST segment elevation, 2) angina or coronary artery spasm provoked by ergonovine, or 3) angiographically demonstrated coronary artery spasm.

In those patients who have had angiography, the presence of significant fixed obstructive disease is not incompatible with the diagnosis of vasospastic angina, provided that the above criteria are satisfied.

Nifedipine Extended-release Tablet may also be used where the clinical presentation suggests a possible vasospastic component but where vasospasm has not been confirmed, e.g., where pain has a variable threshold on exertion or in unstable angina where electrocardiographic findings are compatible with intermittent vasospasm, or when angina is refractory to nitrates and/or adequate doses of beta-blockers.

II.

Chronic Stable Angina (Classical Effort-Associated Angina) Nifedipine Extended-release Tablet is indicated for the management of chronic stable angina (effort-associated angina) without evidence of vasospasm in patients who remain symptomatic despite adequate doses of beta-blockers and/or organic nitrates or who cannot tolerate those agents.

In chronic stable angina (effort-associated angina) nifedipine has been effective in controlled trials of up to eight weeks duration in reducing angina frequency and increasing exercise tolerance, but confirmation of sustained effectiveness and evaluation of long-term safety in these patients is incomplete.

Controlled studies in small numbers of patients suggest concomitant use of nifedipine and beta-blocking agents may be beneficial in patients with chronic stable angina, but available information is not sufficient to predict with confidence the effects of concurrent treatment, especially in patients with compromised left ventricular function or cardiac conduction abnormalities.

When introducing such concomitant therapy, care must be taken to monitor blood pressure closely since severe hypotension can occur from the combined effects of the drugs.

(See WARNINGS .) III.

Hypertension Nifedipine Extended-release Tablet is indicated for the treatment of hypertension.

It may be used alone or in combination with other antihypertensive agents.

PEDIATRIC USE

Pediatric Use Safety and effectiveness in pediatric patients have not been established.

PREGNANCY

Pregnancy Pregnancy Category C Nifedipine has been shown to produce teratogenic findings in rats and rabbits, including digital anomalies similar to those reported for phenytoin.

Digital anomalies have been reported to occur with other members of the dihydropyridine class and are possibly a result of compromised uterine blood flow.

Nifedipine administration was associated with a variety of embryotoxic, placentotoxic, and fetotoxic effects, including stunted fetuses (rats, mice, rabbits), rib deformities (mice), cleft palate (mice), small placentas and underdeveloped chorionic villi (monkeys), embryonic and fetal deaths (rats, mice, rabbits), and prolonged pregnancy/decreased neonatal survival (rats; not evaluated in other species).

On a mg/kg basis, all of the doses associated with the teratogenic embryotoxic or fetotoxic effects in animals were higher (3.5 to 42 times) than the maximum recommended human dose of 120 mg/day.

On a mg/m 2 basis, some doses were higher and some were lower than the maximum recommended human dose but all are within an order of magnitude of it.

The doses associated with placentotoxic effects in monkeys were equivalent to or lower than the maximum recommended human dose on a mg/m 2 basis.

There are no adequate and well-controlled studies in pregnant women.

Nifedipine Extended-release Tablets should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

INFORMATION FOR PATIENTS

Information for Patients Nifedipine Extended-release Tablets should be swallowed whole.

Do not chew, divide or crush tablets.

Do not be concerned if you occasionally notice in your stool something that looks like a tablet.

In Nifedipine Extended-release Tablet, the medication is contained within a nonabsorbable shell that has been specially designed to slowly release the drug for your body to absorb.

When this process is completed, the empty tablet is eliminated from your body.

DOSAGE AND ADMINISTRATION

Dosage must be adjusted according to each patient’s needs.

Therapy for either hypertension or angina should be initiated with 30 or 60 mg once daily.

Nifedipine Extended-release Tablets should be swallowed whole and should not be bitten or divided.

In general, titration should proceed over a 7-14 day period so that the physician can fully assess the response to each dose level and monitor blood pressure before proceeding to higher doses.

Since steady-state plasma levels are achieved on the second day of dosing, titration may proceed more rapidly, if symptoms so warrant, provided the patient is assessed frequently.

Titration to doses above 120 mg are not recommended.

Angina patients controlled on nifedipine capsules alone or in combination with other antianginal medications may be safely switched to Nifedipine Extended-release Tablets at the nearest equivalent total daily dose (e.g., 30 mg t.i.d.

of nifedipine capsules may be changed to 90 mg once daily of Nifedipine Extended-release Tablets).

Subsequent titration to higher or lower doses may be necessary and should be initiated as clinically warranted.

Experience with doses greater than 90 mg in patients with angina is limited.

Therefore, doses greater than 90 mg should be used with caution and only when clinically warranted.

No “rebound effect” has been observed upon discontinuation of Nifedipine Extended-release Tablets.

However, if discontinuation of nifedipine is necessary, sound clinical practice suggests that the dosage should be decreased gradually with close physician supervision.

Care should be taken when dispensing Nifedipine Extended-release Tablets to assure that the extended release dosage form has been prescribed.

Coadministration with Other Antianginal Drugs Sublingual nitroglycerin may be taken as required for the control of acute manifestations of angina, particularly during nifedipine titration.

See PRECAUTIONS, Drug Interactions , for information on coadministration of nifedipine with beta-blockers or long-acting nitrates.