Duovir-E Kit is a combination of three antiviral medicines: Lamivudine, Zidovudine and Efavirenz. They work by preventing HIV (virus) from multiplying, thereby reducing the amount of virus in your body. They also increase the CD4 cell (white blood cells that protect against infection) count in your blood. Duovir E Kit 1’s- Bawaamedicals, Goripalaiyam, Madurai.