efavirenz, an antiviral. 
INDICATIONS: It is used to treat HIV-1 in combination with other antiretroviral agents. CONTRAINDICATIONS: Known hypersensitivity to this drug prohibits its use. ADVERSE EFFECTS: Adverse effects include abdominal pain, headache, dizziness, fatigue, impaired concentration, insomnia, abnormal dreams, and depression. Common side effects include diarrhea, nausea, and rash.
