telbivudine, an antiretroviral. ▪ INDICATIONS: This drug is used in the treatment of hepatitis B. ▪ CONTRAINDICATIONS: Lactation and known hypersensitivity to this drug prohibit its use. ▪ ADVERSE EFFECTS: Adverse effects of this drug include weakness, taste change, hearing loss, photophobia, abdominal pain, hepatomegaly, lactic acidosis, myalgia, arthralgia, muscle cramps, and cough. Common side effects include fever, headache, malaise, dizziness, insomnia, nausea, vomiting, diarrhea, anorexia, and rash.