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HIV Pre-exposure Prophylaxis (PrEP) and Post-Exposure Prophylaxis (PEP)

General information


PrEP (pre-exposure prophylaxis) can reduce your chance of getting HIV from sex or injection drug use. When taken as prescribed, PrEP is highly effective for preventing HIV.


PEP (post-exposure prophylaxis) means taking medicine to prevent HIV after a possible exposure. PEP should be used only in emergency situations and must be started within 72 hours after a recent possible exposure to HIV.

HIV PrEP and PEP Resources

CDC STI, HIV and HIV PrEP/PEP General Information and Factsheets
California Department of Public Health (CDPH) PrEP & PEP Quick Access