How Lamivudine, Tenofovir disoproxil fumarate, and Nevirapine work Lamivudine, Tenofovir disoproxil fumarate, and Nevirapine is a combination of three antiviral medications. They work by preventing the HIV virus from multiplying, thereby reducing the amount of virus in your body. Additionally, they increase the CD4 cell count, which are white blood cells that protect against infection, in your blood.
Common side effects of Lamivudine, Tenofovir disoproxil fumarate, and Nevirapine include nausea, diarrhea, dizziness, rash, tiredness, weakness, headache, fever, insomnia (difficulty sleeping), depression, and cough.