Essential answer
Post-exposure prophylaxis (PEP) is time sensitive. WHO and NIH guidance says it should be started as soon as possible after a potential exposure and no later than 72 hours. A qualified service must assess the individual situation and local protocol.
What to do now
- 1Contact an authorized local service
An emergency department, sexual-health clinic, occupational-health service or authorized HIV service can assess the situation.
- 2State that the possible exposure was recent
This helps the service recognize that a time-sensitive assessment may be needed. You do not need to submit details to this website.
- 3Follow local clinical guidance
Eligibility, testing and medicines vary by jurisdiction and personal circumstances.
Your privacy
The Center does not ask for names, partners, sexual histories, precise location, medical records, HIV status or identification. Regional links open only after you choose them.