This product is used with otherHIVmedicationsto help control HIV infection. It helps to decrease the amount of HIV in your body so yourimmune systemcan work better. This lowers your chance of getting HIV complications (such as new infections,cancer) and improves your quality of life. This product is a combination of two different drugs:emtricitabineandtenofoviralafenamide. Emtricitabine is called a nucleoside reverse transcriptase inhibitor, while tenofovir alafenamide is called a nucleotide reverse transcriptase inhibitor.