An affiliate of the Institute of Human Virology, University of Maryland School of Medicine

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PrEP: questions and answers

Answers to the most frequently asked questions about PrEP (pre-exposure prophylaxis), the medicine that helps HIV-negative people stay negative.

Below you’ll find answers to the questions we are asked most often about PrEP. We keep adding to this page — if your question is not here, ask a health worker at any of the facilities listed below.

About PrEP and how to take it

1What is PrEP?

PrEP is a pill that is taken once a day and helps prevent HIV infection.

2How well does it work?

PrEP is an antiretroviral drug which helps HIV negative people stay negative. When taken daily, PrEP has been shown to reduce the chance of getting HIV by more than 90%.

3What is the difference between PrEP, PEP, and ART?

All three contain antiretroviral medicines in different combination for different purposes:


  • PrEP (pre-exposure prophylaxis) is a pill that has two anti-HIV medicines taken daily to prevent HIV for HIV negative people.

  • PEP (post-exposure prophylaxis) is a pill containing three anti-HIV medicines taken within 72 hours after exposure to HIV (e.g. after rape) for 28 days to prevent HIV

  • ART (antiretroviral therapy) is a 3-medicine treatment for HIV-positive people to reduce the levels of HIV in a person’s body


PrEP is only taken by people who are HIV negative. PrEP is only recommended for HIV-negative people who are at high risk of getting HIV.

4Is PrEP for me?

Taking a pill every day for ongoing protection from HIV might not be for everybody, but it is an excellent option for people at high risk of getting HIV. Most people can safely use PrEP, but a healthcare provider will provide you with information to help determine whether you should take PrEP.

5What happens when I forget to take my pill?

If you forget to take the pill, take it as soon as you remember and continue to take it consistently daily.

6If I take PrEP, should I take it for lifetime?

No, it is important to take PrEP daily if you feel that you are at high risk of being infected with HIV. But if you feel that you are no longer at high risk, you should consult your health care worker before you stop.

7What happens when I want to stop taking PrEP?

If you feel that you no longer need PrEP, talk to your health care provider before you stop. They will tell you about other HIV prevention options.

8Can I take PrEP only for a night?

No, you should take PrEP daily for it to work effectively.

9Does PrEP prevent STIs and Pregnancy?

No, PrEP does not protect against pregnancy and Sexual Transmitted Infections (STIs). PrEP reduces the risk of getting HIV. Use it together with condom to prevent STIs and pregnancy.

10Is PrEP safe?

Yes! PrEP is very safe.

11How often should I take PrEP?

You take one PrEP pill once a day. It helps to take the pill at the same time each day.

Safety, side effects and testing

12Can I use PrEP and contraceptive together?

Yes, PrEP can be taken with any other contraceptive methods.

13Can I share PrEP with other people, my HIV-positive partner or use someone else’s HIV medication?

Never, it is important not to share your PrEP pills.

14Does PrEP have side effects?

All medicines potentially have some side effects. Most are minor and can be tolerated. These side effects differ with different people. Some people get mild side effects when they start PrEP. The most common side effects associated with PrEP medicines include nausea, headache, tiredness, diarrhea, depression, tiredness, and changes in appetite. Only one person in ten people could have side effects and, in most people, these side effects go away within a few weeks.

15What happens if you take PrEP and you are HIV-positive?

PrEP should not be used as HIV treatment. For PrEP we use two ARV medicines while HIV positive people need a combination of three antiretroviral drugs for treatment. Thus, using PrEP medicines means treatment is sub-optimal and the person will develop treatment failure and possibly resistance to ARV medicines. PrEP works when used together with other effective HIV prevention methods. It does not prevent STIs or pregnancy.

16If I use PrEP, can I stop using condom when having sex?

PrEP is an additional HIV prevention option. No single HIV prevention method is 100% effective and PrEP is no exception thus where possible, should be used in combination with other methods such as condoms. Using condoms is an effective way to prevent HIV infection. Condoms protect against STIs and pregnancy when used correctly and consistently.

17How long does it take for PrEP to become protective?

When taken every day, PrEP is safe and highly effective in preventing HIV infection. PrEP reaches maximum protection from HIV for receptive anal sex at about seven days of daily use. For receptive vaginal sex and injection drug use, PrEP reaches maximum protection at about 20 days of daily use.

18Can I acquire HIV while using PrEP?

When taken daily and consistently, PrEP can reduce the risk of getting HIV by 90%.

19Can I drink alcohol while taking PrEP?

There are no known interactions between PrEP medicines and alcohol. However, drinking too much may lead you to forget to take your medicine on time. In this case, it is usually best to take your pill before you start drinking.

20Are there tests that must be conducted before I can take PrEP?

Yes, there are tests that must be conducted before you can take PrEP. The first test is to confirm that you are HIV-negative through a rapid HIV test. There are other tests that are required to confirm if you have Hepatitis B and to establish the state of your kidney, but you can usually start PrEP before getting the results of these last two tests.

Myths and facts about PrEP

Myth

Fact

One Event Driven (ED) PrEP is only for gay men

PrEP is for anyone who doesn’t have HIV but at risk of getting it through sex or IV drug use.

PrEP is expensive

It is free

It is hard to get a prescription for PrEP

Any licensed health care provider can prescribe PrEP

You only need to take PrEP after having unprotected sex

You must take PrEP consistently for it to protect you from HIV if ever exposed. PEP (Post Exposure Prophylaxis) is taken after having unprotected sex.

It is only for people with multiple sexual partners

It is good to take it even with one sexual partner.

PrEP has bad side effects

It is safe, and most people don’t have any side effects. Most of the side effects are mild such as headache, nausea, abdominal pain.

You’ll need to stay on PrEP for the rest of your life

One can go off PrEP once they are no longer at risk.

Where to get PrEP: IHVN-supported facilities

  1. Agbonchia Model Primary Health Centre
  2. Ahoada General Hospital
  3. Akpajo Model Primary Health Centre
  4. Ayungu Biri Model Primary Health Centre
  5. Bonny General Hospital
  6. Bonny KP One Stop Shop
  7. Bori General Hospital
  8. Braithwaite Memorial Specialist Hospital
  9. Churchill Model Primary Health Centre
  10. Ebubu Model Primary Health Centre
  11. Eleme General Hospital
  12. Health of the Sick Hospital, Nkpogu
  13. HIV/AIDS Resource Centre, Port-Harcourt
  14. Ibaka Model Primary Health Centre
  15. Initiative for Advancement of Humanity (IAH)
  16. Isiokpo General Hospital
  17. KPIF Obio-Akpor KP OSS
  18. Mgbundukwu (Okija) Model Primary Health Centre
  19. Nchia Health Centre
  20. Obio Cottage Hospital
  21. Ogoloma Model Primary Health Centre
  22. Okomoko General Hospital
  23. Okrika General Hospital
  24. Okuru-ama Model Primary Health Centre
  25. Onne Model Primary Health Centre
  26. Oyigbo Comprehensive Health Centre
  27. Pope John Paul Clinic
  28. Rumuodomaya Model Primary Health Centre
  29. Terabor General Hospital
  30. University of Portharcourt Teaching Hospital

  1. Akwanga Primary Health Care Center
  2. Akwanga General Hospital
  3. Our Lady of Apostles Hospital - Akwanga
  4. Awe General Hospital
  5. Doma General Hospital
  6. Doma Primary Health Center
  7. Maraba Gurku Primary Health Center
  8. Masaka Primary Health Care
  9. Karu Primary Health Center
  10. Mararaba Guruku Medical Center
  11. Mission Hospital
  12. Uke General Hospital
  13. Anguwan Waje Primary Health Care
  14. Federal Medical Center - Keffi
  15. Keffi General Hospital
  16. Garaku General Hospital
  17. Dalhatu Araf Specialist Hospital
  18. Doma Road Primary Health Care Center
  19. Graceland Clinic - Lafiya
  20. PHC Tudun Kauri
  21. Shabu Model Comprehensive Center
  22. Main Town Nasarawa Primary Health Care
  23. General Hospital Mararaba Odege
  24. Nasarawa General Hospital
  25. Alushi ERCC
  26. Nasarawa Eggon General Hospital
  27. Obi General Hospital
  28. Obi Primary Health Care Center - Agyragu
  29. St. Bernards Clinic - Akanga
  30. Wamba General Hospital
  31. KPIF_Akwanga OSS
  32. Karu KP one stop shop
  33. KPIF_Karu OSS
  34. Lafia KP One Stop Shop

  1. ANAWIM OSS
  2. Gwagwalada KP OSS
  3. Gwarimpa OSS
  4. International Centre for Advocacy on Rights to Health
  5. Mabushi OSS
  6. Nyanya OSS
  7. Reach Care Foundation
  8. Youthrise OSS

  1. Alheri Clinic
  2. Batsari General Hospital
  3. Baure General Hospital
  4. Federal Medical Center - Katsina
  5. Funtua General Hospital
  6. Ingawa General Hospital
  7. Jibia General Hospital
  8. Kankara General Hospital
  9. Kankia General Hospital
  10. Katsina General Hospital
  11. Malumfashi Maternal and Child Health Clinic
  12. Mani General Hospital
  13. Musawa General Hospital
  14. Rimi General Hospital
  15. Daura General Hospital
  16. Danmusa General Hospital
  17. Dutsinma General Hospital
  18. Malumfashi General Hospital
  19. Funtua One Stop Shop
  20. Katsina One Stop Shop
  21. HADEF
  22. Murna Foundation

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