What is the difference between PrEP & PEP?

ByDr. Sukrit Thiramanus Sexual Health
PrEP & PEP

PrEP (Pre-Exposure Prophylaxis)

It is an anti-HIV medicine that prevents infection for HIV-negative people. It is taken before having an exposure to infection, and continue until there is no longer a risk.

  1. Take PrEP daily, once a day. (or as instructed by your doctor)
  2. Do blood tests to follow up the effectiveness of the medication every 3-6 months.
  3. It cannot prevent pregnancy or other STDs such as gonorrhea, chlamydia, or syphilis. So, you should still use condoms.
  4. PrEP may be suitable for you if you really cannot use condoms, or using drugs while having sex.

PEP (Post-Exposure Prophylaxis)

It is an emergency anti-HIV medicine, for those who are HIV-negative, who recently got a possible exposure.

1. You should take the medicine as soon as possible, and do not exceed 72 hours after exposure.
2. Taking the medicine for 28 days continuously.
3. Follow up with blood tests as recommended by your doctor.

Doubt the exposure and unsure of the risks, you may consult with the doctor immediately and get a blood test right away.

Dr. Sukrit Thiramanus

Founder and medical director of Wellmed Clinic, an English-speaking doctor with extensive experience at Surin Hospital and Thathum Hospital. After graduating from Chulalongkorn University in 2015, he has dedicated his experties to addressing the diverse needs of his patients, whether they are locals, tourists, or expats.

During his leisure time, Dr. Sukrit enjoys engaging in water sports such as wakeboarding at wake parks, as well as surfing and paddleboarding. Additionally, he finds great pleasure in staying up-to-date with emerging technological advancements.