Epivir-HBV

Side Effects
Interactions

SIDE EFFECTS

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

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 Trials of 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 EPIVIR-HBV and reported at a rate greater than placebo are listed in Table 2.

Table 2: Clinical Adverse Reactionsa Reported in ≥ 10% of Subjects who Received EPIVIRHBV for 52 to 68 Weeks and at an Incidence Greater than Placebo (Trials 1-3)

Adverse Event EPIVIR-HBV
(n = 332)
Placebo
(n = 200)
Ear, Nose, and Throat
Ear, nose, and throat infections 25% 21%
Sore throat 13% 8%
Gastrointestinal
Diarrhea 14% 12%
a Includes adverse events regardless of severity and causality assessment.

Specified laboratory abnormalities reported in subjects who received EPIVIR-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 EPIVIR-HBV Than With Placebo (Trials 1-3)a

Test (Abnormal Level) Subjects With Abnormality/Subjects With Observations
EPIVIR-HBV Placebo
Serum Lipase ≥ 2.5 x ULNb 10% 7%
CPK ≥ 7 x baseline 9% 5%
Platelets < 50,000/mm³ 4% 3%
a Includes subjects treated for 52 to 68 weeks.
bIncludes 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 EPIVIR-HBV than in subjects who had received placebo. A comparison of ALT elevations between Weeks 52 and 68 in subjects who discontinued EPIVIR-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)

Abnormal Value Subjects With ALT Elevation/ Subjects With Observationsa
EPIVIR-HBVb Placebob
ALT ≥ 2 x baseline value 27% 19%
ALT ≥ 3 x baseline valuec 21% 8%
ALT ≥ 2 x baseline value and absolute ALT > 500 IU/L 15% 7%
ALT ≥ 2 x baseline value; and bilirubin > 2 x ULN and ≥ 2 x baseline value 0.7% 0.9%
a Each subject may be represented in one or more category.
b During treatment phase.
c Comparable to a Grade 3 toxicity in accordance with modified WHO criteria.
ULN = Upper limit of normal.

Adverse Reactions in Clinical Trials of Pediatric Subjects With Chronic Hepatitis 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 EPIVIR-HBV.

Postmarketing Experience

In addition to adverse reactions reported from clinical trials, the following adverse reactions have been reported during postmarketing use of EPIVIR-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.

Read the Epivir-HBV (lamivudine tablets and oral solution) Side Effects Center for a complete guide to possible side effects

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.

Last reviewed on RxList: 1/6/2014
This monograph has been modified to include the generic and brand name in many instances.

Side Effects
Interactions
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