nevirapine, an antiretroviral nonnucleoside reverse transcriptase inhibitor. ▪ INDICATIONS: It is prescribed in combination for the treatment of human immunodeficiency virus infection. ▪ CONTRAINDICATIONS: It should not be given to patients with an allergy or sensitivity to the medication or to patients taking ketoconazole or oral contraceptives. When used alone, there is rapid and uniform appearance of viral resistance. ▪ ADVERSE EFFECTS: The side effects most often reported include headache, rash, drug fever, and diarrhea.