What Is PrEP and How Does It Work?

PrEP (Pre-Exposure Prophylaxis) is a daily oral medication that prevents HIV infection in HIV-negative individuals. The active compounds in PrEP build up in your immune cells and block HIV from replicating if you are exposed — with up to 99% effectiveness when taken consistently. Spectrum offers both Truvada (generic available) and Descovy depending on your needs and coverage. PrEP does not protect against other STIs or pregnancy, so regular STI testing and condom use are still recommended.