Lamivudine

Camber Pharmaceuticals, Inc.
Hetero Labs Limited Unit V

HIGHLIGHTS OF PRESCRIBING INFORMATIONThese highlights do not include all the information needed to use lamivudine tablets (HBV) safely and effectively. See full prescribing information for lamivudine tablets (HBV).LAMIVUDINE Tablets (HBV) for oral use Initial U.S. Approval: 1995BOXED WARNING W A RN ING: RISK OF LACTIC ACIDOSIS, EXACERBATIONS OF HEPATITIS B UPON DISCONTINUATION OF LAMIVUDINE TABLETS (HBV) , AND RISK OF HIV-1 RESISTANCE IF LAMIVUDINE TABLETS (HBV) I S USED IN PATIENTS WITH UNRECOGNIZED OR UNTREATED HIV-1 INFECTION S ee full prescribing information for complete boxed warning Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of nucleoside analogues. Suspend treatment if clinical or laboratory findings suggestive of lactic acidosis or pronounced hepatotoxicity occur. (5.1) S evere acute exacerbations of hepatitis B have been reported in patients who have discontinued anti-hepatitis B therapy (including lamivudine tablets (HBV)). Monitor hepatic function closely in these patients and, if appropriate, initiate anti-hepatitis B treatment. (5.2) Lamivudine tablets (HBV) contain a lower dose of the same active ingredient (lamivudine) as EPIVIR tablets and oral Solution used to treat HIV-1 infection. HIV-1 resistance may emerge in chronic hepatitis B patients with unrecognized or untreated HIV­ 1 infection because the lamivudine dosage in lamivudine tablets (HBV) is subtherapeutic and monotherapy is inappropriate for the treatment of HIV-1 infection. HIV counseling and testing should be offered to all patients before beginning treatment with lamivudine tablets (HBV) and periodically during treatment. (5.3) INDICATIONS AND USAGELamivudine tablets (HBV) are a nucleoside analogue reverse transcriptase inhibitor indicated for the treatment of chronic hepatitis B virus infection associated with evidence of hepatitis B viral replication and active liver inflammation. (1)DOSAGE AND ADMINISTRATION Adult patients: 100 mg, once daily. (2.2) Pediatric patients aged 2 to 17 years: 3 mg per kg once daily up to 100 mg once daily. Prescribe oral solution for pediatric patients requiring less than 100 mg daily. (2.3) Patients with renal impairment: Doses of lamivudine tablets (HBV)must be adjusted in accordance with renal function. (2.4) Lamivudine tablets (HBV)should not be used with other medications that contain lamivudine or emtricitabine. (2.5) DOSAGE FORMS AND STRENGTHS Tablets: 100 mg (3) CONTRAINDICATIONSPatients with previously demonstrated clinically significant hypersensitivity (e.g., anaphylaxis) to any of the components of the products. (4)WARNINGS AND PRECAUTIONS Lamivudine tablets (HBV)should not be used with other medications that contain lamivudine or with medications that contain emtricitabine. (5.4) Emergence of Resistance-Associated HBV Substitutions: Monitor ALT and HBV DNA levels during lamivudine treatment to aid in treatment decisions if emergence of viral mutants or loss of therapeutic response is suspected. (2.6, 5.5) Side Effects• The most common reported adverse reactions in those receiving lamivudine tablets (HBV) (incidence greater than or equal to 10% and reported at a rate greater than placebo) were ear, nose and throat    infections, sore throat, and diarrhea. (6.1)To report SUSPECTED ADVERSE REACTIONS, contact Hetero Labs Limited at 866-495-1995 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

FULL PRESCRIBING INFORMATION: CONTENTS*

• BOXED WARNING
• 1 INDICATIONS & USAGE
• 2 DOSAGE & ADMINISTRATION
  • 2.1 HIV Counseling and Testing
  • 2.2 Dosage in Adult Patients
  • 2.3 Dosage in Pediatric Patients
  • 2.4 Dosage Adjustment in Adult Patients With Renal Impairment
  • 2.5 Important Administration Instructions
  • 2.6 Assessing Patients During Treatment
• 3 DOSAGE FORMS & STRENGTHS
• 4 LAMIVUDINE CONTRAINDICATIONS
• 5 WARNINGS AND PRECAUTIONS
  • 5.1 Lactic Acidosis and Severe Hepatomegaly With Steatosis
  • 5.2 Exacerbation of Hepatitis After Discontinuation of Treatment
  • 5.3 Risk of HIV-1 Resistance if Lamivudine Tablets (HBV) Is Used in Patients With Unrecognized or Untreated HIV-1 Infection
  • 5.4 Coadministration With Other Medications Containing Lamivudine or Emtricitabine
  • 5.5 Emergence of Resistance-Associated HBV Substitutions
• 6 LAMIVUDINE ADVERSE REACTIONS
  • 6.1 Clinical Trials Experience
  • 6.2 Postmarketing Experience
• 7 DRUG INTERACTIONS
• 8 USE IN SPECIFIC POPULATIONS
  • 8.1 Pregnancy
  • 8.3 Nursing Mothers
  • 8.4 Pediatric Use
  • 8.5 Geriatric Use
  • 8.6 Patients With Impaired Renal Function
  • 8.7 Patients With Impaired Liver Function
• 10 OVERDOSAGE
• 11 LAMIVUDINE DESCRIPTION
• 12 CLINICAL PHARMACOLOGY
  • 12.1 Mechanism of Action
  • 12.3 Pharmacokinetics
  • 12.4 Microbiology
• 13 NONCLINICAL TOXICOLOGY
  • 13.1 Carcinogenesis & Mutagenesis & Impairment Of Fertility
• 14 CLINICAL STUDIES
  • 14.1 Clinical Studies of Lamivudine Tablets (HBV) in Adult Patients
  • 14.2 Clinical Studies of Lamivudine Tablets (HBV) in Pediatric Subjects
• 16 HOW SUPPLIED/STORAGE AND HANDLING
• 17 PATIENT COUNSELING INFORMATION
• PATIENT INFORMATION
• PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

FULL PRESCRIBING INFORMATION

1 INDICATIONS & USAGE

Lamivudine tablets (HBV) are indicated for the treatment of chronic hepatitis B virus (HBV) infection associated with evidence of hepatitis B viral replication and active liver inflammation [see Clinical Studies (14.1, 14.2)].

The following points should be considered when initiating therapy with lamivudine tablets (HBV):

• Due to high rates of resistance development in treated patients, initiation of treatment with lamivudine tablets (HBV) should only be considered when the use of an alternative antiviral agent with a higher genetic barrier to resistance is not available or appropriate.
• Lamivudine tablets (HBV) have not been evaluated in patients co-infected with HIV, hepatitis C virus (HCV), or hepatitis delta virus.
• Lamivudine tablets (HBV) have not been evaluated in liver transplant recipients or in patients with chronic hepatitis B virus infection with decompensated liver disease.
• Lamivudine tablets (HBV) have not been evaluated in pediatric patients younger than 2 years of age with chronic HBV infection.

2 DOSAGE & ADMINISTRATION

2.1 HIV Counseling and Testing

HIV counseling and testing should be offered to all patients before beginning treatment with lamivudine tablets (HBV) and periodically during treatment because of the risk of emergence of resistant-HIV-1 and limitation of treatment options if lamivudine tablets (HBV) is prescribed to treat chronic hepatitis B infection in a patient who has unrecognized HIV-1 infection or acquires HIV-1 infection during treatment [see Warnings and Precautions (5.3)].

2.2 Dosage in Adult Patients

The recommended oral dosage of lamivudine tablets (HBV) is 100 mg once daily.

2.3 Dosage in Pediatric Patients

The recommended oral dosage of lamivudine tablets (HBV) for pediatric patients aged 2 to 17 years is 3 mg per kg once daily up to a maximum daily dosage of 100 mg. The oral solution formulation should be prescribed for patients requiring a dosage less than 100 mg or if unable to swallow tablets.

2.4 Dosage Adjustment in Adult Patients With Renal Impairment

Dosage recommendations for adult patients with reduced renal function are provided in Table 1 [see Clinical Pharmacology (12.3)].

Table 1. Dosage of Lamivudine Tablets (HBV) in Adult Patients With Renal Impairment

Following correction of the dosage for renal impairment, no additional dosage modification of lamivudine tablets (HBV) is required after routine (4-hour) hemodialysis or peritoneal dialysis [see Clinical Pharmacology (12.3)].

There are insufficient data to recommend a specific dosage of lamivudine tablets (HBV) in pediatric patients with renal impairment.

2.5 Important Administration Instructions

• Lamivudine tablets (HBV) may be administered with or without food.
• The tablets may be used interchangeably [see Clinical Pharmacology (12.3)].
• The oral solution should be used for doses less than 100 mg.
• Lamivudine tablets (HBV) should not be used with other medications that contain lamivudine or medications that contain emtricitabine [see Warnings and Precautions (5.4)].

2.6 Assessing Patients During Treatment

Patients should be monitored regularly during treatment by a physician experienced in the management of chronic hepatitis B. During treatment, combinations of such events such as return of persistently elevated ALT, increasing levels of HBV DNA over time after an initial decline below assay limit, progression of clinical signs or symptoms of hepatic disease, and/or worsening of hepatic necroinflammatory findings may be considered as potentially reflecting loss of therapeutic response. Such observations should be taken into consideration when determining the advisability of continuing therapy with lamivudine tablets (HBV).

The optimal duration of treatment, the durability of HBeAg seroconversions occurring during treatment, and the relationship between treatment response and long-term outcomes such as hepatocellular carcinoma or decompensated cirrhosis are not known.

3 DOSAGE FORMS & STRENGTHS

• Lamivudine tablets (HBV): 100 mg are pink colored, capsule shaped, biconvex, film coated tablets, debossed with ‘37’ on one side and ‘I’ on the other side.

4 CONTRAINDICATIONS

Lamivudine tablets (HBV) are contraindicated in patients who have experienced a previous hypersensitivity reaction (e.g., anaphylaxis) to lamivudine or to any component of the tablets.

5 WARNINGS AND PRECAUTIONS

5.1 Lactic Acidosis and Severe Hepatomegaly With Steatosis

Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of nucleoside analogues alone or in combination, including lamivudine tablets (HBV) and other antiretrovirals. A majority of these cases have been in women. Obesity and prolonged nucleoside exposure may be risk factors. Most of these reports have described patients receiving nucleoside analogues for treatment of HIV infection, but there have been reports of lactic acidosis in patients receiving lamivudine for hepatitis B. Particular caution should be exercised when administering lamivudine tablets (HBV) to any patient with known risk factors for liver disease; however, cases have also been reported in patients with no known risk factors. Treatment with lamivudine tablets (HBV) should be suspended in any patient who develops clinical or laboratory findings suggestive of lactic acidosis or pronounced hepatotoxicity (which may include hepatomegaly and steatosis even in the absence of marked transaminase elevations).

5.2 Exacerbation of Hepatitis After Discontinuation of Treatment

Clinical and laboratory evidence of exacerbations of hepatitis have occurred after discontinuation of lamivudine tablets (HBV) (these have been primarily detected by serum ALT elevations, in addition to the re-emergence of HBV DNA commonly observed after stopping treatment; see Table 4 for more information regarding frequency of posttreatment ALT elevations) [see Adverse Reactions (6.1)]. Although most events appear to have been self-limited, fatalities have been reported in some cases. The causal relationship of hepatitis exacerbation after discontinuation of lamivudine tablets (HBV) has not been clearly established. Patients should be closely monitored with both clinical and laboratory follow-up for at least several months after stopping treatment with lamivudine tablets (HBV). There is insufficient evidence to determine whether re-initiation of lamivudine tablets (HBV) alters the course of posttreatment exacerbations of hepatitis.

5.3 Risk of HIV-1 Resistance if Lamivudine Tablets (HBV) Is Used in Patients With Unrecognized or Untreated HIV-1 Infection

Lamivudine tablets (HBV) contain a lower lamivudine dose than the lamivudine dose in the following drugs used to treat HIV-1 infection:

• EPIVIR® tablets and oral solution,
• COMBIVIR® (lamivudine/zidovudine) tablets,
• EPZICOM® (abacavir sulfate and lamivudine) tablets, and
• TRIZIVIR® (abacavir, lamivudine, and zidovudine) tablets.

The formulation and dosage of lamivudine in lamivudine tablets (HBV) are not approved for patients co-infected with HBV and HIV. If a decision is made to administer lamivudine to such patients, the higher dosage indicated for HIV therapy should be used as part of an appropriate combination regimen, and the prescribing information for EPIVIR, COMBIVIR, EPZICOM, or TRIZIVIR, as well as for lamivudine tablets (HBV), should be consulted. HIV counseling and testing should be offered to all patients before beginning lamivudine tablets (HBV) and periodically during treatment because of the risk of rapid emergence of resistant HIV and limitation of treatment options if lamivudine tablets (HBV) is prescribed to treat chronic hepatitis B in a patient who has unrecognized or untreated HIV-1 infection or acquires HIV-1 infection during treatment.

5.4 Coadministration With Other Medications Containing Lamivudine or Emtricitabine

Do not coadminister lamivudine tablets (HBV) with other lamivudine-containing products including EPIVIR (lamivudine), COMBIVIR (lamivudine/zidovudine), EPZICOM (abacavir/lamivudine), or TRIZIVIR (abacavir/lamivudine/zidovudine).

Do not coadminister lamivudine tablets (HBV) with emtricitabine-containing products including ATRIPLA® (efavirenz/emtricitabine/tenofovir disoproxil fumarate), COMPLERA® (rilpivirine/emtricitabine/tenofovir disoproxil fumarate), EMTRIVA® (emtricitabine), STRIBILD® (elvitegravir/cobicistat/emtricitabine/tenofovir disoproxil fumarate), or TRUVADA® (emtricitabine/tenofovir disoproxil fumarate).

5.5 Emergence of Resistance-Associated HBV Substitutions

In controlled clinical trials, YMDD-mutant HBV was detected in subjects with on– lamivudine tablets (HBV) re-appearance of HBV DNA after an initial decline below the solution-hybridization assay limit [see Microbiology (12.4)]. Subjects treated with lamivudine tablets (HBV) (adults and children) with YMDD-mutant HBV at 52 weeks showed diminished treatment responses in comparison with subjects treated with lamivudine tablets (HBV) without evidence of YMDD substitutions, including the following: lower rates of HBeAg seroconversion and HBeAg loss (no greater than placebo recipients), more frequent return of positive HBV DNA, and more frequent ALT elevations. In the controlled trials, when subjects developed YMDD-mutant HBV, they had a rise in HBV DNA and ALT from their own previous on-treatment levels. Progression of hepatitis B, including death, has been reported in some subjects with YMDD-mutant HBV, including subjects from the liver transplant setting and from other clinical trials. In clinical practice, monitoring of ALT and HBV DNA levels during treatment with lamivudine tablets (HBV) may aid in treatment decisions if emergence of viral mutants is suspected.

6 ADVERSE REACTIONS

The following adverse reactions are discussed in greater detail in other sections of the labeling:

• Lactic acidosis and severe hepatomegaly with steatosis [see Warnings and Precautions (5.1)].
• Exacerbation of hepatitis B after discontinuation of treatment [see Warnings and Precautions (5.2)].
• Risk of emergence of resistant HIV-1 infection [see Warnings and Precautions (5.3)].
• Risk of emergence of resistant HBV infection [see Warnings and Precautions (5.4)].

6.1 Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Adverse Reactions in Clinical Trialsof Adults With Chronic Hepatitis B Virus Infection:Clinical adverse reactions (regardless of investigator’s causality assessment) reported in greater or equal to 10% of subjects who received lamivudine tablets (HBV) and reported at a rate greater than placebo are listed in Table 2.

Table 2. Clinical Adverse Reactions^a Reported in ≥10% of Subjects who Received Lamivudine Tablets (HBV) for 52 to 68 Weeks and at an Incidence Greater than Placebo (Trials 1 to 3)

^a   Includes adverse events regardless of severity and causality assessment.

Specified laboratory abnormalities reported in subjects who received lamivudine tablets (HBV) and reported at a rate greater than in subjects who received placebo are listed in Table 3.

Table 3. Frequencies of Specified Laboratory Abnormalities Reported During Treatment at a Greater Frequency in Subjects Treated with Lamivudine Tablets (HBV)Than With Placebo (Trials 1 to 3)^a

^a Includes subjects treated for 52 to 68 weeks.

^b Includes observations during and after treatment in the 2 placebo-controlled trials that collected this information.

ULN = Upper limit of normal.

In subjects followed for up to 16 weeks after discontinuation of treatment, posttreatment ALT elevations were observed more frequently in subjects who had received lamivudine tablets (HBV) than in subjects who had received placebo. A comparison of ALT elevations between Weeks 52 and 68 in subjects who discontinued lamivudine tablets (HBV) at Week 52 and subjects in the same trials who received placebo throughout the treatment course is shown in Table 4.

Table 4. Posttreatment ALT Elevations With No-Active-Treatment Follow-up (Trials 1 and 3)

^aEach subject may be represented in one or more category.

^bDuring treatment phase.

^cComparable to a Grade 3 toxicity in accordance with modified WHO criteria.

ULN = Upper limit of normal.

Adverse Reactions in Clinical Trialsof Pediatric Subjects With ChronicHepatitis B Virus Infection:Most commonly observed adverse reactions in the pediatric trials were similar to those in adult trials. Posttreatment transaminase elevations were observed in some subjects followed after cessation of lamivudine tablets (HBV).

6.2 Postmarketing Experience

In addition to adverse reactions reported from clinical trials, the following adverse reactions have been reported during postmarketing use of lamivudine tablets (HBV). Because these reactions are reported voluntarily from a population of unknown size, it is not always possible to reliably estimate the frequency or establish a causal relationship to drug exposure. These reactions have been chosen for inclusion due to a combination of their seriousness, frequency of reporting, or potential causal connection to lamivudine.
Blood and Lympatic System Disorders: Thrombocytopenia.
Digestive: Stomatitis.
Endocrine and Metabolic: Hyperglycemia.
General: Weakness.
Blood and Lymphatic: Anemia (including pure red cell aplasia and severe anemias progressing on therapy), lymphadenopathy, splenomegaly.
Hepatic and Pancreatic: Lactic acidosis and steatosis, posttreatment exacerbation of hepatitis [see Boxed Warning], pancreatitis.
Hypersensitivity: Anaphylaxis, urticaria.
Musculoskeletal: Cramps, rhabdomyolysis.
Nervous: Paresthesia, peripheral neuropathy.
Respiratory: Abnormal breath sounds/wheezing.
Skin: Alopecia, pruritus, rash.

7 DRUG INTERACTIONS

Lamivudine is predominantly eliminated in the urine by active organic cationic secretion. The possibility of interactions with other drugs administered concurrently should be considered, particularly when their main route of elimination is active renal secretion via the organic cationic transport system (e.g., trimethoprim). No data are available regarding interactions with other drugs that have renal clearance mechanisms similar to that of lamivudine.

8 USE IN SPECIFIC POPULATIONS

8.1 Pregnancy

Teratogenic Effects:

Pregnancy Category C.
There are no adequate and well-controlled trials of lamivudine tablets (HBV) in pregnant women. Because animal reproduction studies are not always predictive of human response, lamivudine tablets (HBV) should be used during pregnancy only if the potential benefits outweigh the potential risks to the fetus.

Antiretroviral Pregnancy Registry:
To monitor maternal-fetal outcomes of pregnant women exposed to lamivudine, a Pregnancy Registry has been established. Healthcare providers are encouraged to register patients by calling 1-800-258-4263.

Animal Data: Animal reproduction studies in rats and rabbits revealed no evidence of teratogenicity. Reproduction studies have been performed in rats and rabbits at orally administered doses up to 4,000 mg/kg/day and 1,000 mg/kg/day, respectively, producing plasma levels up to approximately 60 times that for the adult HBV dose. Evidence of early embryolethality was seen in the rabbit at exposure levels similar to those observed in humans, but there was no indication of this effect in the rat at exposure levels up to 60 times those in humans.

Studies in pregnant rats and rabbits showed that lamivudine is transferred to the fetus through the placenta.

8.3 Nursing Mothers

Lamivudine is excreted in human milk. Samples of breast milk obtained from 20 mothers receiving lamivudine monotherapy (300 mg twice daily, 6 times the recommended dosage for hepatitis B infection) or combination therapy (150 mg lamivudine twice daily [3 times the recommended dosage for hepatitis B infection] and 300 mg zidovudine twice daily) had measurable concentrations of lamivudine.

Because of the potential for serious adverse reactions in nursing infants, a decision should be made to discontinue lamivudine tablets (HBV) taking into consideration the importance of continued hepatitis B therapy to the mother and the known benefits of breastfeeding.

8.4 Pediatric Use

Lamivudine tablets (HBV) is indicated for the treatment of chronic hepatitis B virus infection in pediatric patients aged 2 to 17 years [see Indications and Usage (1), Clinical Pharmacology (12.3), Clinical Studies (14.2)]. The safety and efficacy of lamivudine tablets (HBV) in pediatric patients younger than 2 years have not been established.

8.5 Geriatric Use

Clinical trials of lamivudine tablets (HBV) did not include sufficient numbers of subjects aged 65 and over 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, and of concomitant disease or other drug therapy. In particular, because lamivudine is substantially excreted by the kidney and elderly patients are more likely to have decreased renal function, renal function should be monitored and dosage adjustments should be made accordingly [see Dosage and Administration (2.4), Clinical Pharmacology (12.3)].

8.6 Patients With Impaired Renal Function

Reduction of the dosage of lamivudine tablets (HBV) is recommended for patients with impaired renal function [see Dosage and Administration (2.4), Clinical Pharmacology (12.3)].

8.7 Patients With Impaired Liver Function

No dose adjustment for lamivudine is required for patients with impaired hepatic function.

10 OVERDOSAGE

There is no known antidote for lamivudine tablets (HBV). If overdose occurs, the patient should be monitored, and standard supportive treatment utilized, as required.

Because a negligible amount of lamivudine was removed via (4-hour) hemodialysis, continuous ambulatory peritoneal dialysis, and automated peritoneal dialysis, it is not known if continuous hemodialysis would provide clinical benefit in a lamivudine overdose event.

11 DESCRIPTION

Lamivudine tablet (HBV) is a synthetic nucleoside analogue with activity against HBV. The chemical name of lamivudine, USP is 2(1H) - Pyrimidinone, 4-amino-1- [2- (hydroxymethyl)-1,3-oxathio-lan-5-yl], (2R-cis)-.It has a molecular formula of C₈H₁₁N₃O₃S and a molecular weight of 229.26. It has the following structural formula:

Lamivudine USP is a white to an off white solid and soluble in water.

Lamivudine Tablets (HBV) are for oral administration. Each tablet contains 100 mg of lamivudine, USP and the inactive ingredients crospovidone, isomalt, isopropyl alcohol, magnesium stearate and methylene chloride. The tablets are coated with Opadry Pink containing hypromellose, iron oxide red, polyethylene glycol, polysorbate 80, titanium dioxide and yellow iron oxide.

12 CLINICAL PHARMACOLOGY

12.1 Mechanism of Action

Lamivudine is an antiviral agent [see Microbiology (12.4)].

12.3 Pharmacokinetics

Pharmacokinetics in Adults: The pharmacokinetic properties of lamivudine have been studied as single and multiple oral doses ranging from 5 mg to 600 mg per day administered to HBV-infected subjects.

Absorption and Bioavailability: Following single oral doses of 100 mg, the peak serum lamivudine concentration (C_max) in HBV-infected patients (steady state) and healthy subjects (single dose) was 1.28 ± 0.56 mcg per mL and 1.05 ± 0.32 mcg per mL (mean ± SD), respectively, which occurred between 0.5 and 2 hours after administration. The area under the plasma concentration versus time curve (AUC_{[0 to 24h]}) following 100-mg lamivudine oral single and repeated daily doses to steady state was 4.3 ± 1.4 (mean ± SD) and 4.7 ± 1.7 mcg•hour per mL, respectively. The relative bioavailability of the tablet and oral solution were demonstrated in healthy subjects. Although the solution demonstrated a slightly higher peak serum concentration (C_max), there was no significant difference in systemic exposure (AUC) between the oral solution and the tablet. Therefore, the oral solution and the tablet may be used interchangeably.

After oral administration of lamivudine once daily to HBV-infected adults, the AUC and C_max increased in proportion to dose over the range from 5 mg to 600 mg once daily.

Absolute bioavailability in 12 adult subjects was 86% ± 16% (mean ± SD) for the 150-mg tablet and 87% ± 13% for the 10-mg per mL oral solution.

Effects of Food on Oral Absorption: The 100-mg tablet was administered orally to 24 healthy subjects on 2 occasions, once in the fasted state and once with food (standard meal: 967 kcal; 67 grams fat, 33 grams protein, 58 grams carbohydrate). There was no significant difference in systemic exposure (AUC) in the fed and fasted states.

Distribution: The apparent volume of distribution after IV administration of lamivudine to 20 asymptomatic HIV-1-infected subjects was 1.3 ± 0.4 L per kg, suggesting that lamivudine distributes into extravascular spaces. Volume of distribution was independent of dose and did not correlate with body weight.

Binding of lamivudine to human plasma proteins is less than 36% and independent of dose. In vitro studies showed that over the concentration range of 0.1 to 100 mcg per mL, the amount of lamivudine associated with erythrocytes ranged from 53% to 57% and was independent of concentration.

Metabolism: Metabolism of lamivudine is a minor route of elimination. In humans, the only known metabolite of lamivudine is the trans-sulfoxide metabolite. In 9 healthy subjects receiving 300 mg of lamivudine as single oral doses, a total of 4.2% (range: 1.5% to 7.5%) of the dose was excreted as the trans-sulfoxide metabolite in the urine, the majority of which was excreted in the first 12 hours. Serum concentrations of the trans-sulfoxide metabolite have not been determined.

Elimination: The majority of lamivudine is eliminated unchanged in urine by active organic cationic secretion. In 9 healthy subjects given a single 300-mg oral dose of lamivudine, renal clearance was 199.7 ± 56.9 mL per min (mean ± SD). In 20 HIV-1-infected subjects given a single IV dose, renal clearance was 280.4 ± 75.2 mL per min (mean ± SD), representing 71% ± 16% (mean ± SD) of total clearance of lamivudine.

In most single-dose trials in HIV-1-infected subjects, HBV-infected subjects, or healthy subjects with serum sampling for 24 hours after dosing, the observed mean elimination half-life (t1/2) ranged from 5 to 7 hours. In HIV-1-infected subjects, total clearance was 398.5 ± 69.1 mL per min (mean ± SD). Oral clearance and elimination half-life were independent of dose and body weight over an oral dosing range of 0.25 to 10 mg per kg.

Special Populations: Adults With Renal Impairment: The pharmacokinetic properties of lamivudine have been determined in healthy subjects and in subjects with impaired renal function, with and without hemodialysis (Table 5).

Table 5. Pharmacokinetic Parameters (Mean ± SD) Dose-Normalized to a Single 100-mg Oral Dose of Lamivudine in Subjects With Varying Degrees of Renal Function

Exposure (AUC), C_max, and half-life increased with diminishing renal function (as expressed by creatinine clearance). Apparent total oral clearance (Cl/F) of lamivudine decreased as creatinine clearance decreased. T_max was not significantly affected by renal function. Based on these observations, it is recommended that the dosage of lamivudine be modified in patients with renal impairment [see Dosage and Administration (2.4)].

Hemodialysis increases lamivudine clearance from a mean of 64 to 88 mL per min; however, the length of time of hemodialysis (4 hours) was insufficient to significantly alter mean lamivudine exposure after a single-dose administration. Continuous ambulatory peritoneal dialysis and automated peritoneal dialysis have negligible effects on lamivudine clearance. Therefore, it is recommended, following correction of dose for creatinine clearance, that no additional dose modification be made after routine hemodialysis or peritoneal dialysis.

It is not known whether lamivudine can be removed by continuous (24-hour) hemodialysis.

Pediatric Patients With Renal Impairment: The effect of renal impairment on lamivudine pharmacokinetics in pediatric patients with chronic hepatitis B is not known.

Adults With Hepatic Impairment: The pharmacokinetic properties of lamivudine in adults with hepatic impairment are shown in Table 6). Subjects were stratified by severity of hepatic impairment.

Table 6. Pharmacokinetic Parameters (Mean ± SD) Dose-Normalized to a Single 100-mg Dose of Lamivudine in Subjects With Normal or Impaired Hepatic Function a Hepatic impairment assessed by aminopyrine breath test.

Pharmacokinetic parameters were not altered by diminishing hepatic impairment. Therefore, no dose adjustment for lamivudine is required for patients with impaired hepatic function. Safety and efficacy of lamivudine tablets (HBV) have not been established in the presence of decompensated liver disease [see Indications and Usage (1)].

Adults Post-Hepatic Transplant: Fourteen HBV-infected subjects received liver transplant following lamivudine therapy and completed pharmacokinetic assessments at enrollment, 2 weeks after 100-mg once-daily dosing (pre-transplant), and 3 months following transplant; there were no significant differences in pharmacokinetic parameters. The overall exposure of lamivudine is primarily affected by renal impairment; consequently, transplant patients with renal impairment had generally higher exposure than patients with normal renal function. Safety and efficacy of lamivudine tablets (HBV) have not been established in this population [see Indications and Usage (1)].

Pediatric Subjects: Lamivudine pharmacokinetics were evaluated in a 28-day dose-ranging trial in 53 pediatric subjects with chronic hepatitis B. Subjects aged 2 to 12 years were randomized to receive lamivudine 0.35 mg per kg twice daily, 3 mg per kg once daily, 1.5 mg per kg twice daily, or 4 mg per kg twice daily. Subjects aged 13 to 17 years received lamivudine 100 mg once daily. Lamivudine T_max was 0.5 to 1 hour. In general, both C_max and exposure (AUC) showed dose proportionality in the dosing range studied. Weight-corrected oral clearance was highest at age 2 and declined from 2 to 12 years, where values were then similar to those seen in adults. A dose of 3 mg per kg given once daily produced a steady-state lamivudine AUC (mean 5,953 ng•hour per mL ± 1,562 SD) similar to that associated with a dose of 100 mg per day in adults.

Gender: There are no significant gender differences in lamivudine pharmacokinetics.

Race: There are no significant racial differences in lamivudine pharmacokinetics.

Drug Interactions: Interferon Alfa: Multiple doses of lamivudine and a single dose of interferon were coadministered to 19 healthy male subjects in a pharmacokinetics trial. Results indicated a 10% reduction in lamivudine AUC, but no change in interferon pharmacokinetic parameters when the 2 drugs were given in combination. All other pharmacokinetic parameters (C_max, T_max, and t1/2) were unchanged. There was no significant pharmacokinetic interaction between lamivudine and interferon alfa in this trial.

Ribavirin: In vitro data indicate ribavirin reduces phosphorylation of lamivudine, stavudine, and zidovudine. However, no pharmacokinetic (e.g., plasma concentrations or intracellular triphosphorylated active metabolite concentrations) or pharmacodynamic (e.g., loss of HIV-1/HCV virologic suppression) interaction was observed when ribavirin and lamivudine (n = 18), stavudine (n = 10), or zidovudine (n = 6) were coadministered as part of a multi-drug regimen to HIV-1/HCV co-infected subjects.

Trimethoprim/Sulfamethoxazole: Lamivudine and trimethoprim/sulfamethoxazole (TMP/SMX) were coadministered to 14 HIV-positive subjects in a single-center, open-label, randomized, crossover trial. Each subject received treatment with a single 300-mg dose of lamivudine and TMP 160 mg/SMX 800 mg once a day for 5 days with concomitant administration of lamivudine 300 mg with the fifth dose in a crossover design. Coadministration of TMP/SMX with lamivudine resulted in an increase of 44% ± 23% (mean ± SD) in lamivudine AUC, a decrease of 29% ± 13% in lamivudine oral clearance, and a decrease of 30% ± 36% in lamivudine renal clearance. The pharmacokinetic properties of TMP and SMX were not altered by coadministration with lamivudine.

Zidovudine: Lamivudine and zidovudine were coadministered to 12 asymptomatic HIV-positive adult subjects in a single-center, open-label, randomized, crossover trial. No significant differences were observed in AUC or total clearance for lamivudine or zidovudine when the 2 drugs were administered together. Coadministration of lamivudine with zidovudine resulted in an increase of 39% ± 62% (mean ± SD) in Cmax of zidovudine.

12.4 Microbiology

M echanism of Action:Lamivudine is a synthetic nucleoside analogue. Intracellularly, lamivudine is phosphorylated to its active 5′-triphosphate metabolite, lamivudine triphosphate, 3TC-TP. The principal mode of action of 3TC-TP is the inhibition of the RNA- and DNA­ dependent polymerase activities of HBV reverse transcriptase (rt) via DNA chain termination after incorporation of the nucleotide analogue into viral DNA. 3TC-TP is a weak inhibitor of mammalian α, β, and γ-DNA polymerases.

Antiviral Activity:Activity of lamivudine against HBV in cell culture was assessed in HBV DNA-transfected 2.2.15 cells, HB611 cells, and infected human primary hepatocytes. EC₅₀ values (the concentration of drug needed to reduce the level of extracellular HBV DNA by 50%) varied from 0.01 µM (2.3 ng per mL) to 5.6 µM (1.3 mcg per mL) depending upon the duration of exposure of cells to lamivudine, the cell model system, and the protocol used. See the EPIVIR prescribing information for information regarding activity of lamivudine against HIV.

R esistance:Lamivudine-resistant isolates were identified in subjects with virologic breakthrough, defined when using solution hybridization assay as the detection of HBV DNA in serum on 2 or more occasions after failing to detect HBV DNA on 2 or more occasions and defined when using PCR assay as a greater than 1 log₁₀(10-fold) increase in serum HBV DNA from nadir during treatment in a subject who had an initial virologic response.

Lamivudine-resistant HBV isolates develop rtM204V/I substitutions in the YMDD motif of the catalytic domain of the viral reverse transcriptase. rtM204V/I substitutions are frequently accompanied by other substitutions (rtV173L, rtL180M) which enhance the level of lamivudine resistance or act as compensatory substitutions improving replication efficiency. Other substitutions detected in lamivudine-resistant HBV isolates include rtL80I and rtA181T.

In 4 controlled clinical trials in adults with HBeAg-positive chronic hepatitis B virus infection (CHB), YMDD-mutant HBV was detected in 81 of 335 subjects receiving lamivudine tablets (HBV) 100 mg once daily for 52 weeks. The prevalence of YMDD substitutions was less than 10% in each of these trials for subjects studied at 24 weeks and increased to an average of 24% (range in 4 trials: 16% to 32%) at 52 weeks. In limited data from a long-term follow-up trial in subjects who continued 100 mg per day lamivudine tablets (HBV) after one of these trials, YMDD substitutions further increased from 18% (10 of 57) at 1 year to 41% (20 of 49), 53% (27 of 51), and 69% (31 of 45) after 2, 3, and 4 years of treatment, respectively. Over the 5-year treatment period, the proportion of subjects who developed YMDD-mutant HBV at any time was 69% (40 of 58).

In a controlled trial, treatment-naive subjects with HBeAg-positive CHB were treated with lamivudine tablets (HBV) or lamivudine tablets (HBV) plus adefovir dipivoxil combination therapy. Following 104 weeks of therapy, YMDD-mutant HBV was detected in 7 of 40 (18%) subjects receiving combination therapy compared with 15 of 35 (43%) subjects receiving therapy with only lamivudine tablets (HBV). In another controlled trial, combination therapy was evaluated in adult subjects with HBeAg-positive CHB who had YMDD-mutant HBV and diminished clinical and virologic response to lamivudine tablets (HBV). Following 52 weeks of lamivudine tablets (HBV) plus adefovir dipivoxil combination therapy (n = 46) or therapy with only lamivudine tablets (HBV) (n = 49), YMDD-mutant HBV was detected less frequently in subjects receiving combination therapy, 62% versus 96%.

A published trial suggested that the rates of lamivudine resistance in subjects treated for HBeAg-negative CHB appear to be more variable (0% to 27% at 1 year and 10% to 56% at 2 years).

Pediatric Subjects: In a controlled trial in pediatric subjects, YMDD-mutant HBV was detected in 31 of 166 (19%) subjects receiving lamivudine tablets (HBV) for 52 weeks. For a subgroup that remained on therapy with lamivudine tablets (HBV) in a follow-up trial, YMDD substitutions increased from 24% (29 of 121) at 12 months to 59% (68 of 115) at 24 months and 64% (66 of 103) at 36 months of treatment with lamivudine tablets (HBV).

Cross-Resistance: HBV containing lamivudine resistance-associated substitutions (rtL180M, rtM204I, rtM204V, rtL180M and rtM204V, rtV173L and rtL180M and rtM204V) retain susceptibility to adefovir dipivoxil but have reduced susceptibility to entecavir (30 fold) and telbivudine (greater than 100 fold). The lamivudine resistance-associated substitution rtA181T results in diminished response to adefovir and telbivudine. Similarly, HBV with entecavir resistance-associated substitutions (I169T/M250V and T184G/S202I) have greater than 1,000-fold reductions in susceptibility to lamivudine.

13 NONCLINICAL TOXICOLOGY

13.1 Carcinogenesis & Mutagenesis & Impairment Of Fertility

Carcinogenesis: Long-term carcinogenicity studies with lamivudine in mice and rats showed no evidence of carcinogenic potential at exposures up to 34 times (mice) and 200 times (rats) those observed in humans at the recommended therapeutic dose for chronic hepatitis B.

Mutagenesis: Lamivudine was not active in a microbial mutagenicity screen or an in vitro cell transformation assay, but showed weak in vitro mutagenic activity in a cytogenetic assay using cultured human lymphocytes and in the mouse lymphoma assay. However, lamivudine showed no evidence of in vivo genotoxic activity in the rat at oral doses of up to 2,000 mg per kg producing plasma levels of 60 to 70 times those in humans at the recommended dose for chronic hepatitis B.

Impairment of Fertility: In a study of reproductive performance, lamivudine administered to rats at doses up to 4,000 mg per kg per day, producing plasma levels 80 to 120 times those in humans, revealed no evidence of impaired fertility and no effect on the survival, growth, and development to weaning of the offspring.

14 CLINICAL STUDIES

14.1 Clinical Studies of Lamivudine Tablets (HBV) in Adult Patients

The safety and efficacy of lamivudine tablets (HBV) 100 mg once daily versus placebo were evaluated in 3 controlled trials in subjects with compensated chronic hepatitis B virus infection. All subjects were aged 16 years or older and had chronic hepatitis B virus infection (serum HBsAg-positive for at least 6 months) accompanied by evidence of HBV replication (serum HBeAg-positive and positive for serum HBV DNA) and persistently elevated ALT levels and/or chronic inflammation on liver biopsy compatible with a diagnosis of chronic viral hepatitis. The results of these trials are summarized below.

• Trial 1 was a randomized, double-blind trial of lamivudine tablets (HBV) 100 mg once daily versus placebo for 52 weeks followed by a 16-week no-treatment period in 141 treatment-naive US subjects.
• Trial 2 was a randomized, double-blind, 3-arm trial that compared lamivudine tablets (HBV) 25 mg once daily versus lamivudine tablets (HBV) 100 mg once daily versus placebo for 52 weeks in 358 Asian subjects.
• Trial 3 was a randomized, partially-blind trial conducted primarily in North America and Europe in 238 subjects who had ongoing evidence of active chronic hepatitis B despite previous treatment with interferon alfa. The trial compared lamivudine tablets (HBV) 100 mg once daily for 52 weeks, followed by either lamivudine tablets (HBV) 100 mg or matching placebo once daily for 16 weeks (Arm 1), versus placebo once daily for 68 weeks (Arm 2).

Principal endpoint comparisons for the histologic and serologic outcomes in subjects receiving lamivudine tablets (HBV) (100 mg daily) or placebo in these trials are shown in the following tables.

Table 7. Histologic Response at Week 52 Among Adult Subjects Receiving Lamivudine Tablets (HBV) 100 mg Once Daily or Placebo

^a  Improvement was defined as a greater than or equal to 2-point decrease in the Knodell Histologic Activity Index (HAI) at Week 52 compared with pretreatment HAI. Subjects with missing data at baseline were excluded.

Table 8. HBeAg Seroconverters^a at Week 52 Among Adult Subjects Receiving Lamivudine Tablets (HBV) 100 mg Once Daily or Placebo

a Three-component seroconversion was defined as Week 52 values showing loss of HBeAg, gain of HBeAb, and reduction of HBV DNA to below the solution-hybridization assay limit. Subjects with negative baseline HBeAg or HBV DNA assay were excluded from the analysis.

Normalization of serum ALT levels was more frequent with lamivudine tablets (HBV) treatment compared with placebo in Trials 1 to 3.

The majority of subjects treated with lamivudine tablets (HBV) showed a decrease of HBV DNA to below the assay limit early in the course of therapy. However, reappearance of assay-detectable HBV DNA during treatment with lamivudine tablets (HBV) was observed in approximately one-third of subjects after this initial response.

14.2 Clinical Studies of Lamivudine Tablets (HBV) in Pediatric Subjects

The safety and efficacy of lamivudine tablets (HBV) were evaluated in a double-blind clinical trial in 286 subjects aged from 2 to 17 years, who were randomized (2:1) to receive 52 weeks of lamivudine tablets (HBV) (3 mg per kg once daily to a maximum of 100 mg once daily) or placebo. All subjects had compensated chronic hepatitis B accompanied by evidence of hepatitis B virus replication (positive serum HBeAg and positive for serum HBV DNA by a research branched-chain DNA assay) and persistently elevated serum ALT levels. The combination of loss of HBeAg and reduction of HBV DNA to below the assay limit of the research assay, evaluated at Week 52, was observed in 23% of subjects treated with lamivudine tablets (HBV) and 13% of placebo-treated subjects. Normalization of serum ALT was achieved and maintained to Week 52 more frequently in subjects treated with lamivudine tablets (HBV) compared with placebo (55% versus 13%). As in the adult controlled trials, most subjects treated with lamivudine tablets (HBV) had decreases in HBV DNA below the assay limit early in treatment, but about one-third of subjects with this initial response had reappearance of assay-detectable HBV DNA during treatment. Adolescents (aged 13 to 17 years) showed less evidence of treatment effect than younger pediatric subjects.

16 HOW SUPPLIED/STORAGE AND HANDLING

Lamivudine tablets (HBV), 100 mg are pink colored, capsule shaped, biconvex, film coated tablets, debossed with ‘37’ on one side and ‘I’ on the other side.

          Bottle of 60 tablets                                          NDC 31722--752-60

          Bottle of 600 tablets                                        NDC 31722--752-06

          Blister card of 10 Unit-dose tablets                  NDC 31722--752-31

          Blister pack of 100 (10x10) Unit-dose tablets   NDC 31722--752-32

Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature]. Preserve in well-closed, light-resistant containers.

17 PATIENT COUNSELING INFORMATION

A dvise the patient to read the FDA-approved patient labeling (Patient Information).

Advice for the Patient

• Advise patients to remain under the care of a physician while taking lamivudine tablets (HBV) and discuss any new symptoms or concurrent medications with their physician.
• Advise patients that lamivudine tablets (HBV) is not a cure for hepatitis B, that the long-term treatment benefits of lamivudine tablets (HBV) are unknown at this time, and, in particular, that the relationship of initial treatment response to outcomes such as hepatocellular carcinoma and decompensated cirrhosis is unknown [see Dosage and Administration (2.6)].
• Inform patients that deterioration of liver disease has occurred in some cases when treatment was discontinued. Instruct patients to discuss any changes in regimen with their physician [see Warnings and Precautions (5.2)].
• Inform patients that emergence of resistant hepatitis B virus and worsening of disease can occur during treatment, and they should promptly report any new symptoms to their physician [see Warnings and Precautions (5.5)].
• Counsel patients on the importance of testing for HIV to avoid inappropriate therapy and development of resistant HIV. HIV counseling and testing should be offered before starting lamivudine tablets (HBV) and periodically during therapy.
• Advise patients that lamivudine tablets (HBV) contain a lower dose of the same active ingredient (lamivudine) as EPIVIR tablets, EPIVIR oral solution, COMBIVIR tablets, EPZICOM tablets, and TRIZIVIR tablets. Lamivudine tablets (HBV) should not be taken concurrently with EPIVIR, COMBIVIR, EPZICOM, or TRIZIVIR [see Dosage and A dministration (2.1), Warnings and Precautions (5.3, 5.4)].
• Advise patients not to take lamivudine tablets (HBV) with emtricitabine-containing medicines, such as ATRIPLA, COMPLERA, EMTRIVA, STRIBILD, or TRUVADA [see Warnings and P recautions (5.4)].
• Advise patients that treatment with lamivudine tablets (HBV) has not been shown to reduce the risk of transmission of HBV to others through sexual contact or blood contamination [see Use in Specific Populations (8.1)].
• Instruct patients to avoid doing things that can spread HBV infection to others.
  • D o not share needles or other injection equipment
  • D o not share personal items that can have blood or body fluids on them, like t oothbrushes and razor blades.
  • D o not have any kind of sex without protection. Always practice safe sex by using a latex or polyurethane condom to lower the chance of sexual contact with semen, vaginal secretions, or blood.

EPIVIR, COMBIVIR, EPZICOM, and TRIZIVIR are registered trademarks of the ViiV Healthcare group of companies.

All brands listed are trademarks of their respective owners and are not trademarks of Hetero Labs Limited. The makers of these brands are not affiliated with and do not endorse Hetero Labs Limited or its products.

Manufactured for:

Camber Pharmaceuticals, Inc.,

Piscataway, NJ 08854

By:HETERO^TM

Hetero Labs Limited,Unit V, Polepally,                                       2023515

Jadcherla, Mahaboob Nagar-509 301, India.                                                      

Revised: December 2013

PATIENT INFORMATION

PHARMACIST-DETACH HERE AND GIVE INSTRUCTIONS TO PATIENTS
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
P ATIENT INFORMATION

Lamivudine Tablets (HBV)

Read this Patient Information before you start taking lamivudine tablets (HBV) and each time you get a refill. There may be new information. This information does not take the place of talking with your healthcare provider about your medical condition or treatment.

What is the most important information I should know about lamivudine tablets (HBV)?

Lamivudine tablets (HBV) c a n cause serious side effects, including:

B u il d- u p of an acid in your blood (lactic acidosis). Lactic acidosis can happen in some people who take lamivudine tablets (HBV) or similar (nucleoside analogs) medicines. Lactic acidosis is a serious medical emergency that can lead to death.

Lactic acidosis can be hard to identify early because the symptoms could seem like symptoms of other health problems. Call your healthcare provider right away if you get any of the following symptoms that could be signs of lactic acidosis:

• feel very weak or tired
• unusual (not normal) muscle pain
• trouble breathing
• stomach pain with nausea and vomiting
• feel cold, especially in your arms and legs
• feel dizzy or light-headed
• have a fast or irregular heartbeat

Se vere liver problems. Severe liver problems can happen in people who take lamivudine tablets (HBV) or similar medicines. In some cases these liver problems can lead to death. Your liver may become large (hepatomegaly) and you may develop fat in your liver (steatosis) when you take lamivudine tablets (HBV). Call your healthcare provider right away if you get any of the following signs of liver problems:

• your skin or the white part of your eyes turns yellow (jaundice)
• dark “tea-colored” urine
• light-colored bowel movements (stools)
• loss of appetite for several days or longer
• nausea
• stomach pain

You may be more likely to get lactic acidosis or severe liver problems if you are female, very overweight, or have been taking nucleoside analogue medicines for a long time.

Worsening liver disease. Your hepatitis B infection may become worse after stopping treatment with lamivudine tablets (HBV). Worsening liver disease can be serious and may lead to death. If you stop treatment with lamivudine tablets (HBV), your healthcare provider will need to check your health and do blood tests to check your liver for at least several months after you stop taking lamivudine tablets (HBV).

Risk of HIV-1 resistance in people with unknown HIV-1 infection or in people with untreated HIV-1 infection. If you have or get HIV that is not being treated with medicines while taking lamivudine tablets (HBV), the HIV virus may develop resistance to certain HIV medicines and become harder to treat.

• Your healthcare provider should offer you counseling and testing for HIV-1 infection before you start treatment for hepatitis B with lamivudine tablets (HBV) and during treatment.
• Lamivudine tablets (HBV) contain a lower dose of lamivudine than other medicines that contain lamivudine and are used to treat HIV-1 infection. See “What should I tell my healthcare provider?” for a list of medicines you should not take with lamivudine tablets (HBV).

Resistant Hepatitis B Virus (HBV). The hepatitis B virus can change (mutate) during your treatment with lamivudine tablets (HBV) and become harder to treat (resistant). If this happens, your liver disease can become worse and may lead to death. Tell your healthcare provider right away if you have any new symptoms.

What are lamivudine tablets (HBV) ?

Lamivudine tablet (HBV) is a prescription medicine used to treat long-term (chronic) hepatitis B virus (HBV) when the disease is progressing and there is liver swelling (inflammation).

• Lamivudine tablets (HBV) will not cure HBV.
• Lamivudine tablets (HBV) may lower the amount of HBV in your body.
• Lamivudine tablets (HBV) may lower the ability of HBV to multiply and infect new liver cells.
• Lamivudine tablets (HBV)may improve the condition of your liver.
• The long-term benefits of taking lamivudine tablets (HBV) for treatment of chronic hepatitis B infection are not known.

It is not known if lamivudine tablets (HBV) is safe and effective in:

• people with chronic HBV who have a severely damaged liver that is unable to work properly (decompensated liver disease)
• people with hepatitis C virus or hepatitis D (delta) virus
• people who have had a liver transplant
• children with chronic HBV less than 2 years of age

Lamivudine tablets (HBV) doe s not stop you from spreading HBV to others by sex, sharing needles, or being exposed to your blood. Avoid doing things that can spread HBV infection to others.

• Do not share or re-use needles or other injection equipment.
• Do not share personal items that can have blood or body fluids on them, like toothbrushes and razor blades.
• Do not have any kind of sex without protection. Always practice safer sex by using a latex or polyurethane condom to lower the chance of sexual contact with semen, vaginal secretions, or blood.

A vaccine is available to protect people at risk for becoming infected with HBV. You can ask your healthcare provider for information about this vaccine.

Who should not take lamivudine tablets (HBV)?

Do not take lamivudine tablets (HBV) if you are allergic to lamivudine or any of the ingredients in lamivudine tablets (HBV). See the end of this leaflet for a complete list of ingredients in lamivudine tablets (HBV).

What should I tell my healthcare provider before taking lamivudine tablets (HBV)?

Be fore you take lamivudine tablets (HBV), tell your healthcare provider if you:

• have HIV-1 infection
• have kidney problems
• have any other medical condition
• are pregnant or plan to become pregnant. It is not known if lamivudine tablets (HBV) will harm your unborn baby.

P regnancy Registry. There is a pregnancy registry for women who take antiviral medicines during pregnancy. The purpose of this registry is to collect information about the health of you and your baby. Talk to your healthcare provider about how you can take part in this registry.

• are breastfeeding or plan to breastfeed. Lamivudine can pass into your breast milk and may harm your baby. You and your healthcare provider should decide if you will take lamivudine tablets (HBV) or breastfeed.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

D o not take lamivudine tablets (HBV) i f you also take:

• other medicines that contain lamivudine (COMBIVIR^®, EPIVIR^®, EPZICOM^®, TRIZIVIR^®)
• medicines that contain emtricitabine (ATRIPLA^®, COMPLERA^®, EMTRIVA^®, STRIBILD^®, TRUVADA^®)

How should I take lamivudine tablets (HBV)?

• Take lamivudine tablets (HBV) exactly as your healthcare provider tells you to take it.
• Do not change your dose or stop taking lamivudine tablets (HBV) without talking with your healthcare provider.
• Lamivudine tablet (HBV) is taken 1 time each day.
• Your healthcare provider may prescribe a lower dose if you have problems with your kidneys.
• For children 2 to 17 years of age, your healthcare provider will prescribe the right dose of lamivudine tablets (HBV) based on your child’s body weight.
• Take lamivudine tablets (HBV) by mouth, with or without food.
• Tell your healthcare provider if you have trouble swallowing tablets.
• If you take too much lamivudine tablets (HBV), call your healthcare provider or go to the nearest hospital emergency room right away.
• It is important to stay under your healthcare provider’s care while taking lamivudine tablets (HBV). Tell your healthcare provider about any new symptoms that you have.

What are the possible side effects of lamivudine tablets (HBV)?

Lamivudine tablets (HBV) may cause serious side effects, including:

See "What is the most important information I should know about lamivudine tablets (HBV)?"

The most common side effects of lamivudine tablets (HBV) include:

• ear, nose, and throat infections
• sore throat
• diarrhea

Tell your healthcare provider if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of lamivudine tablets (HBV). For more information, ask your healthcare provider or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

How should I store lamivudine tablets (HBV)?

• Store lamivudine tablets (HBV) at room temperature between 68°F to 77°F (20°C to 25°C).

Keep lamivudine tablets (HBV) and all medicines out of the reach of children.

General information about the safe and effective use of lamivudine tablets (HBV)

Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use lamivudine tablets (HBV) for a condition for which it was not prescribed. Do not give lamivudine tablets (HBV) to other people, even if they have the same symptoms that you have. It may harm them.

If you would like more information, talk with your healthcare provider. You can as your pharmacist or healthcare provider for information about lamivudine tablets (HBV) that is written for health professionals.

What are the ingredients in lamivudine tablets (HBV)?

Ac tive ingredient: lamivudine, USP

I n a c tive ingredients:

Lamivudine tablets (HBV): crospovidone, isomalt, isopropyl alcohol, magnesium stearate and methylene chloride. The tablets are coated with Opadry Pink containing hypromellose, iron oxide red, polyethylene glycol, polysorbate 80, titanium dioxide and yellow iron oxide.

This Patient Information has been approved by the U.S. Food and Drug Administration.

EPIVIR, COMBIVIR, EPZICOM, and TRIZIVIR are registered trademarks of the ViiV Healthcare group of companies.

All brands listed are trademarks of their respective owners and are not trademarks of Hetero Labs Limited. The makers of these brands are not affiliated with and do not endorse Hetero Labs Limited or its products.

Manufactured for:

Camber Pharmaceuticals, Inc.,

Piscataway, NJ 08854

By:HETERO^TM

Hetero Labs Limited,Unit V, Polepally,      

Jadcherla, Mahaboob Nagar-509 301, India.

Revised: December 2013

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

Lamivudine Tablets (HBV) 100 mg - Container Label

Lamivudine Tablets (HBV) 100 mg - Blister Carton

Lamivudine Tablets (HBV) 100 mg - Blister Foil