PRECAUTIONS: This medication is not recommended for use if you have the following medical conditions: other severe liver conditions (e.g., autoimmune hepatitis, decompensated liver disease), immune system suppression for organ transplants. Tell your doctor your medical history, especially of: psychiatric conditions (e.g., depression), low blood counts (e.g., red cells, white cells, or platelets), heart problems, thyroid problems, lung diseases (e.g., COPD, asthma, pneumonia), intestinal disease (e.g., colitis), pancreatitis, immune system diseases (e.g., lupus, rheumatoid arthritis), eye problems, diabetes, kidney disease, high blood pressure, brain tumors, seizures, any allergies. Use caution when engaging in activities requiring alertness. Limit alcohol intake. This medication is not recommended for use during pregnancy due to the potential for fetal harm and the risk of serious side effects for the pregnant woman. Consult your doctor for more details. Contraceptive (birth control) measures are recommended for use in men and women while taking this medication. If you become pregnant or think you may be pregnant, inform your doctor immediately. It is not known if this drug passes into breast milk. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Tell your doctor of all over-the-counter and prescription medications you may use including: zidovudine, barbiturates (e.g., phenobarbital), theophylline, vidarabine, other drugs which depress the immune system (e.g., anti-cancer type). Tell your doctor if you take any drugs that make you drowsy such as: sedatives, sleep medication, psychiatric drugs, drugs for anxiety (e.g., diazepam), anti-seizure drugs (e.g., phenytoin), narcotic pain relievers (e.g., codeine), certain antihistamines. Do not start or stop any medicine without doctor or pharmacist approval.