How PrEP For HIV Works

PrEP, which stands for pre-exposure prophylaxis, is a medication regimen designed to reduce the chances of infection by the Human Immunodeficiency Virus (HIV) in at-risk patients. The most widely used PrEP medication is a combination of tenofovir disproxil fumarate (TDF) and emtricitabine. While generic versions of PrEP for HIV exist, in the United States, it is sold as “Truvada” by the pharmaceutical company Gilead Science.