Tenofovir/emtricitabine, trademark Truvada, is a fixed-dose combination of two antiretroviral drugs used for the treatment of HIV. It consists of 300 milligrams of tenofovir and 200 milligrams of emtricitabine. By combining the two agents into one tablet, it reduces the pill burden and increases compliance with antiretroviral therapy. The drug has been examined for use as a pre-exposure prophylaxis against HIV infection. A Cochrane review found that both tenofovir alone, as well as the tenofovir/emtricitabine combination, significantly decreased the risk of contracting HIV. The Food and Drug Administration approved it for prophylactic use on July 16, 2012. The drug has side effects including: nausea, vomiting, dizziness, loss of appetite and diarrhea, liver and kidney toxicity and loss of bone density.