SIDE EFFECTS: Nausea, vomiting, diarrhea, dizziness, headache, fatigue, or infections of the ear/nose/throat may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if any of these unlikely but serious side effects occur: mental/mood changes, muscle/joint pain, persistent nausea/vomiting, stomach/abdominal pain, dark urine, yellowing of eyes/skin. Tell your doctor right away if any of these rare but very serious side effects occur: deep/rapid breathing, drowsiness, tingling/numbness in hands or feet. A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before taking lamivudine-HBV, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: pancreatitis. Before using lamivudine-HBV, tell your doctor or pharmacist your medical history, especially of: HIV infection, kidney disease, blood disorders, liver disease. This drug may make you dizzy or drowsy. Alcohol or marijuana can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana. Liquid preparations of lamivudine-HBV contain sugar (sucrose). If you are a diabetic using the liquid form of this drug, closer monitoring of your blood sugar is recommended as you begin using this drug. Talk with your doctor or pharmacist for more details. Kidney function declines as you grow older. This medication is removed by the kidneys. Therefore, elderly people may be at a greater risk for side effects while using this drug. Children, especially those with pancreatitis, may be more sensitive to the effects of this drug. This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This medication has not been shown to prevent the passing of hepatitis B from the mother to the newborn. Consult your doctor for more information. This medication may pass into breast milk and have undesirable effects on a nursing infant. Therefore, breast-feeding is not recommended while using this drug. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. A product that may interact with this drug is: sorbitol. Do not take this medication with other products (including those that treat HIV infection) that contain lamivudine. Emtricitabine is similar to lamivudine and should not be taken with this medication. Lamivudine-HBV can affect the results of certain lab tests (e.g., liver function tests). Make sure laboratory personnel and your doctors know you use this drug.

OVERDOSE: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.