Efavir-600 tablets are a type of HIV medication that is used to treat infections. Efavirenz, a non-nucleoside reverse transcriptase inhibitor, is the active ingredient in these tablets. It functions by inhibiting the reverse transcriptase enzyme, which is required for HIV replication. Treatment dosage and duration are determined by the individual patient and the severity of their HIV infection. These tablets are typically taken orally once daily, with or without food, unless otherwise directed by a healthcare provider. It is critical to take these tablets exactly as directed and to follow all healthcare provider instructions.