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HIV Treatment

HIV treatment basically consists of taking tablets – Antiretroviral Therapy (ART). The trick is to determine which tablets you need to take and when you need to take them.

Aside from taking tablets to control the HIV infection directly, HIV treatment also consists of monitoring for and treating any opportunistic infections (i.e. infections that happen when the patient’s immune system is weak) and taking care of the patient’s general health and well being. In this article, we will concentrate on the medicines used to treat HIV directly.

When do you need to start taking medicines?

This is rather controversial. WHO guidelines say that when you CD4 drops to 350, you should start on medicines. It also says that when your CD4 drops to 500, you can also start to take medicines. This basically means you only should start taking medicines when you immune system is starting to become significantly weakened by the HIV virus.

However, some studies have shown that if a patient is given treatment early on in the infection (i.e. even before the CD4 drops to 500), he/she will benefit in many ways like having less nerve or heart damage later on in life. In a famous study called the Visconti Cohort, the patients given strong anti-HIV treatment very early on in the infection actually could stop taking the medicines after a few years and the disease did not get worse.

At the end of the day, when to start treatment is a decision both you and your doctor have to make together.

What medicines to take?

This is also very complex. There are several factors that have to be considered. These are namely:

  1. Resistance – is the HIV strain that the patient have resistant to any medicines?
  2. Allergies – is the patient allergic to any of the medicines? This applies especially to a medicine called Abacavir. People with certain genes cannot take it.
  3. Availability – is the medicine available in the patient’s country
  4. Cost
  5. Tablet load – how many tablets must a patient take a day? The fewer the better
  6. Side effects

What are the medicines available?

HIV medicines are divided into 5 classes. Each class has different medicines but they do more or less the same thing (i.e. they have the same mechanism of action). Each class interrupts the HIV life cycle in its own way.

  1. Nucleoside Reverse Transcriptase Inhibitors (NRTIs) aka Nukes

These drugs act by blocking the copying of HIV RNA to DNA. If the HIV RNA cannot be copied to DNA, it cannot join with the DNA of your cell and therefore cannot reproduce

  1. Non-Nucleoside Reverse Transcriptase Inhibitors (NNRTIs) aka non-Nukes

These drugs act in the same way as NRTIs but they use different ways to block the copying of RNA to DNA.

  1. Protease Inhibitors (PIs)

After the HIV viral RNA is made, the two ends need to be cut off before it can form into a virus and infect other cells. An enzyme called protease cuts off these 2 ends. This medicine blocks this enzyme. So if the 2 ends cannot be cut off, the HIV RNA cannot become a virus and infect other cells.

  1. Integrase Strand Transfer Inhibitors (INSTIs) aka Integrase Inhibitors

After the HIV RNA is converted to DNA, it has to combine with the DNA of the cell it has infected. This medicine blocks the HIV DNA from combining with the cell’s DNA.

  1. Entry Inhibitors aka Fusion Inhibitors

These medicines block the HIV virus from entering the cell in the first place.

FDCs and STRs

People living with HIV have to take 3 or different types of drug everyday. This could mean taking 6 or more tablets per day. This is of course very challenging and inconvenient for most people.

So pharmaceutical companies have come up with FDCs and STRs.

FDC – Fixed Drug Combinations

These are tablets that contain 2 or more drugs in one tablet. It is primarily used to reduce the number of tablets a patient has to swallow every day.

STRs – Single Tablet Regimens

These are tablets that contain 3 or more drugs in 1 tablet. Basically they have all the drugs a HIV +ve person needs. So treating HIV can be as simple as taking 1 pill a day.


When a patient first starts to take anti-HIV medicines, he may have to see his doctor rather often. This is because we have to monitor the Viral Load and CD4 cell count to make sure the drugs are working. We also need to monitor for side effects.

Once the patient is more stable, the visits usually become further apart. HIV Treatment Clinic in Singapore

Related Topics:

What to expect on your first doctor’s visit

More on HIV Symptoms

HIV Testing FAQ

Understanding the HIV Window Period


Need more advice?

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

Email: hello@dtapclinic.com.sg

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


  1. Dear Dr . Does HIV med also help to treat hep B ?

    • There are certain HIV drugs which are also used in Hepatitis B infection. But it is not as simple as just substituting one for the other.

  2. Millie Johns

    Dear Dr. Tan,

    I have several questions regarding the treatment of HIV Antiviral Medicines.

    Recently I have been diagnosed with HIV +ve and my CD4 apparently has dropped to the number around 400. My questions are: How effective would the ARV treatment to reaach the virus becoming undetectable (time wise)? Would there be any serious adverse effects? Is it true that it is going to be a lifetime medication?

    • This depends on your initial viral load. Each medication has potential risks of side effects, but yes they are effective and yes it will be lifelong medication with the current knowledge we have, until a potential cure is discovered. You should address these questions at your infectious diseases specialist.

  3. Thank you very much Dr. Tan for this wholesome information about HIV Treatment. I was searching HIV Treatment information on the internet & came to your website. It was worth time spending over here & reading articles got so much information & facts about the HIV. Thanks once again Dr Tan !!

  4. I’ve been visiting massage places and have obtained other services which includes intercourse. I would like to know what’s the risk of getting HIV ?

    • Unprotected sex with casual partners certainly put you at risk of HIV and other STDs. Using a condom reduces the risk but does not eliminate it. Medically we find that risk analysis or symptom analysis in such situations is not very useful. The best and most useful thing to do is to get screening tests done.

  5. Rutafururwa sadam

    can this be possible to play football with HIV

    • That is an interesting question. Medically speaking living with HIV does not prevent anyone from doing anything including football and all other sports.

      The concern here arises from how to deal with the other people on the pitch. If you tell them you are HIV +ve, they may react in a very negative way.

      Although the fact remains that it is almost impossible for them to catch HIV from playing football with you even if you have a bleeding wound.

      Of course all bleeding wounds should be cleaned and dressed before a player is allowed to continue playing. But that applies to everyone and not just people living with HIV.