Urgent · Within 72 Hours

PEP: Emergency HIV Prevention After Exposure

Post-Exposure Prophylaxis (PEP) is a short course of medicine that can stop HIV taking hold after a possible exposure — but only if it’s started fast. Confidential, specialist-led care in Greater Noida.

MRCP UKTata Memorial ID & HIV FellowshipFortis Greater Noida
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What you need to know now

PEP must start within 72 hours — sooner is better
It’s a 28-day course of antiretroviral tablets
Substantially reduces HIV risk — not a 100% guarantee
Completely confidential — no judgment
If exposure was in the last 72 hours, call before reading further — time matters most.

⚠️ Possible exposure in the last 72 hours?

PEP works best when started as early as possible — ideally within hours, and no later than 72 hours. Do not wait. Call now for an urgent confidential consultation.

📞 Call now +91 88002 62767WhatsApp urgently
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Completely confidential. Private, judgment-free consultation with Dr. Manuj Sondhi. Your visit and records are kept strictly between you and your doctor.
✓ Reviewed by Dr. Manuj Sondhi, MRCP (UK) — Consultant Physician, Diabetologist & Infectious Disease / HIV Care
Last reviewed: June 2026 · Reg. No. 12-42985 · ORCID: 0009-0007-0394-9480
Do not start random HIV medicines on your own. PEP needs the right drug combination, correct timing, a baseline HIV test, kidney/liver safety checks, a hepatitis assessment and follow-up. The wrong medicine — or stopping early — can cause harm and confusion. Start PEP only under medical supervision.

PEP (Post-Exposure Prophylaxis) is emergency HIV prevention. If you may have been exposed to HIV — through sex, a condom that broke, a needle, or an assault — taking antiretroviral medicine soon afterwards can prevent the virus from establishing infection. The single most important factor is how quickly you start.

The Time Window

Why 72 hours is the deadline

HIV needs time to establish itself in the body after exposure. PEP works by blocking that process — but the window is narrow:

  • Start as soon as possible — ideally within a few hours of exposure.
  • Absolute limit is 72 hours (3 days). After 72 hours, PEP is generally not recommended because the expected benefit is very low — but you should still seek HIV testing, STI testing and prevention advice.
  • Earlier = better. Effectiveness is highest in the first 24 hours and declines as time passes.
If you are inside the 72-hour window, do not wait to finish researching. Call the clinic now — the consultation can happen quickly and confidentially.
When PEP Is Needed

Situations PEP is considered for

PEP is considered after a realistic possibility of HIV exposure, such as:

Condom failure or unprotected sex

With a partner who is HIV-positive or of unknown status.

Sexual assault

PEP is a standard part of care after assault.

Needle or sharps injury

Including occupational (healthcare) and shared-needle exposures.

Other blood/fluid contact

Significant exposure to blood or body fluids of unknown status.

The doctor will assess the actual level of risk — not every contact needs PEP — and advise honestly either way.

How It Works

What to expect with PEP

1

Urgent assessment

A quick, confidential evaluation of the exposure and your risk, plus a baseline HIV test to confirm current status.

2

Start medication fast

If PEP is appropriate, a 28-day course of antiretroviral tablets is started without delay. (These are prescription medicines taken under medical supervision — not something to self-source.)

3

Complete the full course

All 28 days must be taken as directed; stopping early reduces protection. Side effects, if any, are managed along the way.

4

Follow-up testing

Repeat HIV testing after the course confirms the outcome. If you’re at ongoing risk, this is the moment to consider switching to PrEP.

Baseline Tests

What tests may be advised before or during PEP?

If the exposure is high-risk and within 72 hours, PEP is not delayed for test results — treatment starts and the work-up is done alongside. Baseline tests confirm your current status and keep treatment safe:

PurposeTests commonly advised
Current HIV statusHIV 4th-generation test; HIV RNA in selected high-risk or early-symptom cases
Medicine safetyKidney function, liver function, and a blood count where clinically needed
Other infectionsHepatitis B & C, syphilis, gonorrhoea & chlamydia as per exposure
Pregnancy carePregnancy test and emergency-contraception discussion where relevant
Testing must not cost time. If PEP is indicated, it is started urgently and the investigations are completed in parallel.
Follow-Up

Follow-up after starting PEP

Follow-up matters — to complete the 28-day course safely and to confirm HIV has not taken hold:

  • An early check for tolerance, adherence and side effects
  • HIV testing after completing the course, as advised
  • Further HIV testing around 4–6 weeks and 12 weeks after exposure, depending on the test used and your situation
  • STI and hepatitis follow-up where relevant
  • A PrEP discussion if future risk is likely
Risk Assessment

When PEP may not be needed

Not every contact needs PEP. A doctor weighs the type of exposure, the timing, the source’s status and your baseline HIV status. PEP is usually not needed for:

  • Touching, hugging, sharing food or utensils, toilet seats, or other casual contact
  • Intact-skin contact with no blood or genital-fluid exposure
  • Sex with a partner who is HIV-positive but consistently undetectable on treatment (U=U)
  • Exposure where the source is confirmed HIV-negative with no recent risk
If you’re unsure, still ask. A short consultation quickly decides whether PEP is needed — or safely rules it out, sparing you unnecessary medicine.
Important to Know

Honest limits and aftercare

  • PEP is emergency-only, not a regular method. For repeated or ongoing risk, PrEP is the right long-term prevention.
  • It is not 100%, but it substantially reduces the chance of HIV when started early and taken fully.
  • Consider other infections. The same exposure can carry STI or hepatitis risk, so STI testing is usually advised too.
  • Missed the window? If it has been more than 72 hours, PEP won’t help — but testing and a prevention plan still matter. Reach out.
Frequently Asked Questions

Common Questions

How long after exposure can I take PEP?
PEP must be started within 72 hours (3 days) of the possible exposure, and the sooner the better — ideally within hours. After 72 hours, PEP is generally not recommended as the expected benefit is very low, though you should still seek HIV testing, STI testing and prevention advice.
Do I need PEP after a condom break?
PEP may be considered after a condom break if the partner is HIV-positive or of unknown status, or the exposure is otherwise high-risk. Timing is key — if it is within 72 hours, consult urgently. If the partner is confirmed undetectable on treatment, PEP may not be needed.
Can I take PEP after unprotected sex?
PEP may be advised after unprotected sex if there is a realistic possibility of HIV exposure. The doctor assesses the partner’s HIV status, the type of exposure, the timing and your baseline test before deciding.
How effective is PEP at preventing HIV?
PEP is highly effective when started early and the full 28-day course is taken correctly. It is not a guarantee, which is why prompt starting, full adherence, and follow-up testing all matter.
Is PEP confidential?
Yes. PEP care here is private and judgment-free. Seeking PEP is a responsible, routine step and is treated as such.
What are the side effects of PEP?
Modern PEP is generally well tolerated. Some people get mild nausea, tiredness or headache, which usually settle and can be managed. Any concerns during the course can be reviewed with the doctor.
I keep having possible exposures — is PEP the answer each time?
Repeated PEP is a sign that ongoing prevention would serve you better. In that situation PrEP — medicine taken regularly to prevent HIV — is more effective and more practical. The doctor can help you switch.
Explore Further

Related Reading

PrEP — Ongoing HIV PreventionBetter than repeated PEPConfidential HIV TestingBaseline & follow-up testingSTD / STI TestingThe same exposure may carry STI risk
MS

Dr. Manuj Sondhi

MRCP (UK) · Consultant Physician & Diabetologist · Fellowship in Infectious Disease & HIV, Tata Memorial

With 15+ years in metabolic medicine, Dr. Manuj Sondhi cares for patients with diabetes, thyroid and weight-related conditions, and provides expert, confidential HIV, PrEP/PEP and infectious-disease care at Nirvana Clinic, Greater Noida (Delhi NCR). He believes clear information should help you understand your health — and that the right decision for your situation is best made together, in consultation.

Read full profile →💬 Consult Dr. Manuj

Don’t wait — PEP is time-critical

If a possible exposure was within the last 72 hours, every hour counts. Call now for an urgent, confidential consultation. If it has been longer, still reach out — we’ll advise on testing and prevention.

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