(PEP) is a way for a person who may have recently been exposed to HIV to prevent HIV infection. It involves taking anti-HIV medications after a potential exposure to HIV. Anyone who thinks they may have been exposed to HIV should contact their doctor immediately. PEP is not 100% effective.

PEP consists of a combination of two to three anti-HIV drugs that an HIV-negative person who may have been exposed to HIV takes to reduce their risk of HIV infection. …