HIV PEP Eligibility — When You Qualify and How to Get It
PEP (post-exposure prophylaxis) is a 28-day course of antiretroviral medication that can stop HIV from establishing infection after a possible exposure. It must be started within 72 hours — sooner is better. Every hour matters.
If you might need PEP right now, the answer to "should I take it?" is almost always yes, get to an ER or urgent clinic now and ask. Then read the rest of this guide.
The short answer
You qualify for PEP if all of these are true:
- HIV exposure happened within the last 72 hours
- The source person is HIV-positive OR has unknown status with risk factors
- The exposure involved one of these:
- Unprotected vaginal, anal, or oral sex
- Sharing needles, syringes, or drug equipment
- Significant occupational exposure (needle stick, blood splash)
- Sexual assault
- You are HIV-negative or status unknown
If you're not sure — go anyway. PEP eligibility is decided by a clinician quickly, and they err on the side of starting if there's any reasonable risk.
Where to get PEP fast
Best options (open 24/7)
- Emergency room — universal availability; will start PEP immediately
- Urgent care — many can prescribe PEP
- Sexual health clinics with after-hours service (NYC, SF, LA, Chicago have walk-in)
Daytime
- Your primary care provider
- HIV clinic
- Planned Parenthood
- AHF clinic
Telehealth
- Available in many states
- Often can start PEP same-day if you're within 72 hours and meet criteria
- Examples: Mistr, PlushCare, several state-specific services
Don't wait for your regular provider. If they can't see you today and you're within 72 hours, go to ER.
The 72-hour rule
The 72-hour window isn't arbitrary:
- Within 24 hours: Most effective; ~85%+ prevention
- 24-48 hours: Still very effective
- 48-72 hours: Effectiveness drops; still worth taking
- After 72 hours: Not recommended; HIV has already established infection
If you're 71 hours and 50 minutes after exposure, still go. If you're 73 hours after, talk to a doctor but PEP isn't standard.
When PEP is clearly recommended
CDC guidelines clearly recommend PEP for:
Sexual exposures
- Receptive anal sex with HIV+ partner or partner with unknown status from a high-prevalence group
- Insertive anal sex with HIV+ partner not virally suppressed
- Receptive vaginal sex with HIV+ partner
- Insertive vaginal sex with HIV+ partner not virally suppressed
- Receptive oral sex with ejaculation + HIV+ partner with detectable viral load (much lower risk; PEP sometimes recommended)
- Sexual assault — PEP almost always offered
Drug-related
- Sharing needles, syringes, cookers, water with HIV+ person
- Sharing equipment with unknown-status partner in high-prevalence settings
Occupational
- Needle stick from HIV+ patient
- Blood/body fluid splash to mucous membrane or non-intact skin
- Bites that break skin with HIV+ source
Other
- Childbirth-related exposure to maternal HIV+ blood
- Sharing toothbrush/razor with visible blood in some scenarios
When PEP may be optional or not recommended
PEP isn't always indicated. Discuss with provider:
- HIV+ partner with documented undetectable viral load for 6+ months — extremely low transmission risk; PEP not always given (U=U principle)
- Unprotected oral sex without ejaculation — very low risk; PEP rarely given
- Skin contact only (no broken skin or mucous membrane) — not an exposure route
- Saliva, sweat, tears — not transmission routes; PEP not indicated
- Condom that didn't break with HIV+ partner — protection worked; PEP not needed
The PEP regimen
Current first-line (2026)
- Truvada (tenofovir disoproxil fumarate + emtricitabine) + Dolutegravir 50 mg daily
- 28 days, once daily
- Generic versions widely available
- Well-tolerated
Alternative regimens
- Descovy + Dolutegravir (slightly better kidney/bone profile)
- Truvada + Raltegravir (older alternative)
- Special regimens for renal impairment, pregnancy, etc.
Cost without insurance
- $100-500+ generic
- ~$1000-3500 brand
- Many programs cover full cost (see below)
How to pay for PEP
Insurance
- Most insurance plans cover PEP, especially through ER visits
- Some require prior authorization (push back if delayed; ER will often give first doses while waiting)
- Ask about "starter pack" — first 5-7 days often dispensed immediately
Without insurance
- Gilead Sciences Patient Assistance Program — free Truvada/Descovy for eligible patients
- State PEP programs — free PEP in NY, CA, IL, MA, several others
- AHF (AIDS Healthcare Foundation) — free PEP at many locations
- Hospital financial assistance — most hospitals have programs
- Manufacturer copay cards for those with insurance
Sexual assault
- Often free at ER through Crime Victims Compensation or hospital funds
- Connect with rape crisis center for guidance
What to bring to the ER
- ID
- Insurance card if you have one
- Time and details of exposure (be precise — clinical decisions depend on it)
- What you know about the source person (HIV status, viral load if known, risk factors)
- Current medications and allergies
You don't need a referral. You can show up.
What to say at the ER
"I had a possible HIV exposure about [X] hours ago. I'm here for PEP."
That's it. The triage nurse will know what to do. You shouldn't have to explain much beyond the exposure timing and type.
What happens at the visit
- Triage: They confirm time and type of exposure
- Brief consultation: Quick clinical interview — exposure details, your history
- Baseline labs: HIV test (rapid + lab), STI panel, hepatitis B/C, kidney function, pregnancy test if applicable
- First doses dispensed: Often in-ER ("starter pack" — 3-7 days of medication)
- Prescription for remaining 21-25 days
- Follow-up scheduled: 1 week, 4-6 weeks, 3 months
Total time
1-3 hours typically. Sometimes longer if very busy.
What to expect during the 28-day course
Side effects (most are mild)
- Nausea (especially first week)
- Headache
- Fatigue
- Insomnia or weird dreams (with dolutegravir)
- Mild GI upset
These usually improve within 1-2 weeks. Most people complete the full course without issue.
Strict adherence matters
- Don't skip doses
- Set phone alarms
- If you vomit within 1-2 hours of a dose, take it again
- If you miss > 48 hours, contact provider; PEP may be less effective
Follow-up testing
- HIV test at 4-6 weeks (and 3 months for confirmation)
- STI re-test if exposure included STI risk
- Pregnancy test if applicable
After PEP — should I start PrEP?
If you're at ongoing risk, transitioning from PEP to PrEP makes a lot of sense:
- Same medications, different dosing
- Continuous protection
- No future emergency visits needed
- More effective for ongoing exposure
Discuss with your provider at the 4-week PEP follow-up.
See PrEP vs PEP guide for the comparison.
Special situations
Sexual assault
- Most ERs offer PEP automatically for assault
- Free in most US states through Crime Victims Compensation
- Trauma-informed sexual assault nurse examiner (SANE) often available
- STI prophylaxis (ceftriaxone, doxycycline, metronidazole) also offered
- Plan B / Ella for pregnancy prevention if applicable
Already on PrEP and missed doses + exposure
- Talk to provider immediately
- May still need PEP intensification
- Document timing carefully
Multiple repeat exposures
- ER visits each time aren't sustainable
- This is a clear sign you should be on PrEP
- Long-acting injectables (Apretude, Lenacapavir) reduce daily-pill burden
Pregnancy
- PEP is safe in pregnancy
- Some regimens preferred over others (avoid dolutegravir near conception in some guidelines — recent updates have largely de-emphasized this concern, but discuss with provider)
Common myths
"I'll get fired if I take PEP." PEP is widely used and confidential. Your employer doesn't see ER bills for PEP unless you tell them.
"My partner says they're negative — I don't need PEP." Maybe. Discuss with provider. If they're unconfirmed or you're not 100% sure, the safer path is PEP.
"I'll feel sick the whole 28 days." Most people don't. Modern regimens are well-tolerated.
"If I take PEP and it's negative at 6 weeks, I'm clear." Not quite. The standard guidance is testing at 6 weeks AND at 3 months.
Bottom line
PEP works. The window is short. Don't wait.
If you might need PEP:
- Go to an ER, urgent care, or sexual health clinic NOW
- Bring exposure timing and details
- Don't worry about cost upfront — programs exist
- Start within 72 hours, ideally within 24
- Complete the full 28-day course
- Get tested at 6 weeks and 3 months
- Consider transitioning to PrEP if ongoing risk
PEP is one of the best-evidenced interventions in HIV prevention. The downside of taking unnecessary PEP is mild side effects for 28 days. The downside of skipping it when needed is HIV.
For more on HIV prevention, see PrEP vs PEP, PrEP side effects, and condom broke 72-hour action plan. For HIV testing: HIV test types compared.
