PrEP and PEP are both medications used to prevent HIV, but they work in very different ways and at different times. Knowing the difference can help you and your clinician choose the right option for your situation.
What Is PrEP?
Pre-Exposure Prophylaxis (PrEP) is a daily medication taken before potential exposure to HIV. When taken consistently, it significantly reduces the risk of acquiring HIV through sex. PrEP is best suited for people who anticipate ongoing exposure risk, such as those with multiple partners or a partner living with HIV.
What Is PEP?
Post-Exposure Prophylaxis (PEP) is an emergency medication course started after a possible exposure to HIV. It must begin within 72 hours of exposure and is taken daily for 28 days. PEP is not a substitute for ongoing prevention—it's a short-term emergency measure.
- PrEP: taken ahead of time, for ongoing protection
- PEP: taken after a specific exposure, time-sensitive
- Both require a prescription and clinical follow-up
- Neither protects against other STIs—condoms and testing still matter
Which Option Is Right for You?
If you anticipate ongoing risk, PrEP is generally the better long-term choice. If you've had a recent specific exposure, PEP may be appropriate, but time is critical. A licensed clinician can help assess your situation and prescribe accordingly through a private consultation.
This article is for general information only and does not replace professional medical advice, diagnosis, or treatment. Always consult a licensed clinician for decisions about your health.