PrEP stands for Pre-Exposure Prophylaxis. PrEP is prescribed medication which can be taken by individuals at very high risk of becoming infected with HIV. PrEP can stop HIV from infecting and spreading through the body. It is highly effective for preventing HIV if used as prescribed by a doctor, but it is much less effective when not taken consistently. Taking PrEP daily reduces the risk of HIV infection from sex by over 90% and 70% among individuals who inject drugs. The risk of HIV infection can be lowered further with use of PrEP and condoms.