Adults: SUSTIVA 600 mg orally once daily with a protease inhibitor and/or NRTIs. Take on an empty stomach, preferably at bedtime. Food increases concentrations and may increase adverse reactions; bedtime dosing can improve nervous-system tolerability. Always combine with other antiretrovirals.
With voriconazole: increase voriconazole maintenance to 400 mg every 12 hours and decrease efavirenz to 300 mg daily using capsules (one 200 mg plus two 50 mg, or six 50 mg capsules). Do not break SUSTIVA tablets.
With rifampin in patients >=50 kg, the source recommends increasing efavirenz to 800 mg daily.