Post-exposure prophylaxis (PEP) is emergency antiretroviral medication taken after a possible HIV exposure to reduce the chance of infection. WHO and CDC guidance emphasize starting as early as possible — and always within 72 hours of exposure. Earlier start generally means better protection.
As a tourist, you may not know which hospitals stock PEP or whether staff can assess risk in English. Do not wait for the perfect clinic — start at an emergency department or sexual-health service that confirms PEP availability, then ask about English follow-up.
For clinic communication tips, read what to expect without Thai. For non-urgent English clinic shortlisting, see English-speaking HIV clinics. In Bangkok, use Bangkok access guide for dense options. Keep insurance and documents in mind for payment.
1. The 72-hour window — what it means in practice
The clock usually starts from the time of exposure. If you are already past 72 hours, PEP is not recommended per standard guidelines — but you should still seek HIV testing and counseling about future prevention (including PrEP).
Ideal timing is within the first 24 hours. Each hour can matter. If it is night or a holiday, go to a hospital emergency room that can reach an on-call infectious-disease doctor rather than delaying until a small clinic opens.
Situations where PEP is commonly considered
- Condomless sex with someone whose HIV status is unknown or positive and not virally suppressed
- Needle-sharing or occupational needle-stick (less common for tourists but covered by same pathways)
- Sexual assault — seek emergency care immediately; forensic and PEP pathways may run in parallel
2. First steps as a tourist — in order
- Note the time of exposure and your location — you will be asked
- Call or go to the nearest hospital ER or sexual-health clinic and say you need HIV PEP within 72 hours
- Bring passport/ID and any travel insurance documents if you have them
- Expect questions about the exposure, your sex, partner type, and when it happened — answer honestly for proper assessment
- If PEP is started, get written instructions for the full course (usually 28 days), side effects, and follow-up HIV testing dates
Thailand’s health hotline 1663 can help direct you to services in Thai; if language is a barrier, ask the hospital for English-speaking staff or use a trusted translation app for medical terms only — not for delaying care.
3. Where PEP is usually available
PEP is typically stocked at larger hospitals, some private international hospitals, and selected sexual-health clinics — not every small clinic or pharmacy. Community NGOs may triage you to a hospital if the exposure is recent.
Bangkok and major tourist cities have the fastest paths; resort areas may require transfer to a provincial or Bangkok hospital. Confirm PEP on the phone if possible, but do not spend half your window only calling — if one site is unclear, move to an ER.
Questions to ask at intake
- Can you start PEP now, tonight, without waiting for tomorrow’s clinic hours?
- Which drug regimen will I take, and do you have full 28-day supply or only starter pack?
- What baseline blood tests are required today?
- Follow-up visit schedule and English communication for side effects
- Total cost and whether itemized receipt is available for insurance
4. Cost, insurance, and finishing the course
Tourists often pay out of pocket for PEP at private hospitals; costs can be significant. Some travel insurance policies cover emergency post-exposure care — others exclude sexual-health incidents entirely. Read travel insurance and documents before you claim, and keep all receipts and clinical summaries.
Completing the full PEP course is important. If you leave Thailand before 28 days, ask for enough medication to finish abroad and a letter for your home clinician. Side effects like nausea are common; do not stop without medical advice.
After PEP — testing and prevention
- Follow the clinic’s schedule for post-PEP HIV testing (often at 4–6 weeks and later)
- Discuss PrEP if you have ongoing risk — see PrEP for visitors
- Remember U=U for partners on treatment: undetectable viral load means no sexual transmission
5. When PEP is not given — still seek care
Clinicians may decide PEP is not indicated for low-risk exposures, or it may be too late. You should still get baseline HIV testing, STI screening if indicated, and counseling on condoms and PrEP.
If you feel dismissed because you are a foreigner or because of stigma, seek a second hospital opinion while you are still inside the 72-hour window if risk was substantial. Document times and names for insurance only — not for online forums with identifiable detail.
Key takeaways
PEP in Thailand is time-critical: within 72 hours, sooner is better. Tourists should prioritize any hospital that can start PEP now, then sort language and insurance.
Verify protocols and stock with the facility you attend. This page does not replace emergency medical judgment.