Health Information by Dr Tan And Partners (Singapore)

Dr. Tan & Partners was established in 2005 with a vision to provide quality medical services with competency and care to our community - Health Information on Men's Health, Women's Health, Public Health and Sexual Health (HIV/STD)

HIV Post Exposure Prophylaxis (PEP)

HIV Post Exposure Prophylaxis (PEP) 



Do You Know What is PEP?

Post-Exposure Prophylaxis (PEP) involves taking anti-HIV medications as soon as possible after you may have been exposed to HIV to try to reduce the chance of becoming HIV positive. These medications keep HIV from making copies of itself and spreading through your body.


HIV PEP Post Exposure Prophylaxis - YouTube


HIV Post Exposure Prophylaxis (PEP) is a medicine given to people who are at high risk of getting HIV. They are up to 99% effective in preventing a HIV infection.

You are a potential candidate for PEP if:

  • You have been exposed to potentially HIV infected body fluids
  • Your exposure was less than 72 hours ago

Factors that can increase the risk of HIV infection include:

  • Condom Break
  • Presence of Blood (e.g. Menses)
  • Presence of cuts
  • Presence of Ulcers
  • You are not circumcised


These medicines have to be started within 72 hours after possible infection/exposure.

They are taken twice a day for 1 month.

The side effects vary from person to person and also depend on which medicines are used.

Our clinics use the medicines as recommended by the latest US CDC guidelines. These medicines have very limited side effects.

From my experience, more than 9 out of 10 patients do not have any side effects at all. Those that do usually only have mild nausea.

A repeat HIV test will be done once the medicines are finished (1 month). This HIV test will already be very accurate.

In my personal experience, I feel that it is 100% accurate. We will also do another HIV test at 3 months post exposure (2 months after finishing PEP) as recommended by the guidelines.If you are interested in this treatment, please visit us at our clinics.