Dr. Tan and Partners is one of the few approved Anonymous HIV Testing Centres in Singapore. A detailed write up on our service is available here.

Other STD services: Early STD Screening, Rapid Hepatitis B Blood Test, Swab for Gonorrhea and many more... contact us to make an appointment now!

HIV Post Exposure Prophylaxis

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 clinic uses 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.

These medicines cost $1928 at our clinic.  Click here for cost breakdown and details.

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.


Need more advice?

Come down to Our Clinics for a discussion with Our Doctors, or call our clinics for more information:

Singapore Branches


Where to find us – here

Selected clinics are open on Saturday and Sunday.

Email: hello@dtapclinic.com

All Our Doctors are Fully Certified and Trained to conduct specialised STD Screening,  STD Testing & STD Treatment and HIV Testing.

For lady patients who prefer female doctors, we have professional certified female Doctors to attend to your medical needs.


Click here for HIV Testing FAQ

More on HIV symptoms.

If you have any questions, visit our free online forum on sexual health, HIV and STDs.

Click here for Info on STD Symptoms in Men
Click here for Info on STD Symptoms in Women
Click here to see the full range of our HIV/STD Services

If you need a HIV test visit Our Clinics anytime during our opening hours. You do not need an appointment.

Find out more about Anonymous HIV testing at our clinics.

Can’t wait for 3 months to find out? Find out more about Anonymous Rapid HIV Combo test at our clinics.

If you had a high risk exposure to HIV within the past 72 hours, you can take medicines to reduce your risk of actually contracting HIV. Find out more on HIV PEP Treatment.

Click Here for Contact Details, Address and Opening Times.

Related Topics:
Anonymous HIV testing at our Clinics
HIV – Understanding the Window Period
Cost of HIV/STD tests at our Clinics
Condom Broke
Getting HIV from Oral Sex
More on HIV symptoms
How long can HIV live outside the body?

About Dr. Tan
Dr. Tan graduated from the National University of Singapore in 2001. His residency was in the two largest public hospitals in Singapore; Tan Tock Seng Hospital and Singapore General Hospital.

Find the profiles of our panel of doctors.


  1. kumbukani ulemu

    Hie Dr

    My best friend had sex with woman sero status reactive.No condom burst but he is suspecting contamination during wearing a condom.he put on the condom after tuoching the fluid of that girl.the time he was puting on the condom his hands was dry.my question can you transmit the virus while puting on the condom while hands dry after touching the fluid?plz doctor help my room mate he is not eating properly due to stress
    u can answer through my email
    thank u in advance Dr.

    • Dr Justin Sim

      It is unlikely to pass on this way but since she is positive he should be doing testing anyway regardless of whether the condom was contaminated.

  2. Dr Tan,

    A friend of mine started PEP based on your doctor recommendation after consultation and negative HIV test. After 4 days on Truvada and Isentress, indeed not much of a side effect but a bit of bloaty stomach. However, today, he has some flu and mild sore throat. Is this just a side effect of the medication or just by chance that he caught these? Worried about too many things being read online about serconversion or something like that. Appreciate your advise whether for him to return for consultation now or just after 28 days. Thanks.

    • Sero-conversion symptoms usually come on about week 3 and are severe. They are never just a mild flu and sore throat. Click here for more info on HIV ARS. What is the more likely scenario is your friend just caught a cold which many people are down with this time of year in Singapore. His symptoms has nothing to do with the meds or with HIV ARS.