Post Exposure Prophylaxis (PEP) is an emergency measure to be used as a last resort, e.g. if a condom breaks or you have a “slip up” from your usual safer sex routine.
PEP is not always guaranteed to work but has a high success rate.
PEP is free of charge but can only be prescribed by doctors if certain criteria are met.
PEP has to be started within 72 hours of unprotected sex.