The most common side effects of antiretroviral drugs are nausea or vomiting, diarrhoea, tiredness, stomach or head pains, a rash, and loss of appetite.   There are many other side effects. Here we've looked at some of these side effects in more detail.Nausea
Feeling sick (nausea) is one of the most common side effects of antiretroviral drugs.
There are drugs to help, but you should talk to your doctor before taking anything. The nausea drugs may stop your antiretroviral drugs working.
There are some things you can do to help with nausea. 
Eat small amounts of food more often rather than three main meals each day.
Avoid spicy and rich foods.
Learn how you should take your tablets. If you can take them with food this may help.
Some people find that peppermint tea or ginger tea settles their stomach.
There are several reasons why you may feel tired if you have HIV infection. Tiredness can be caused by:
Your doctor may suggest that you have a blood test. This can help your doctor decide what's making you feel tired. The more information you can give your doctor, the easier it will be to find the cause.
If you feel so tired that you can't do the things you'd like to, you should see your doctor. It's important to get treatment because being tired can make your illness get worse more quickly.  Rashes
Most rashes caused by antiretroviral drugs can affect a large part of the body and might make you feel itchy. But they are not usually serious. Nevirapine, efavirenz, atazanavir, and abacavir are known to cause rashes. More severe rashes, which you can get at the same time as a fever or ulcers in the mouth, may need a change in treatment.
Around a quarter of people who take these drugs get a mild or moderate rash. A more severe rash affects about 1 in 100 people with most of the drugs and 1 in 60 with nevirapine. To learn more, see More serious problems with antiretroviral drugs.Lipodystrophy syndrome
If you take antiretroviral drugs, you may find that the shape of your body changes as fat is lost from some areas and gained in others.  Tests may also show that the level of fats in your blood is higher than normal. This can increase the risk that you will develop heart disease, which can lead to a heart attack.
Also, the way your body controls your blood sugar with insulin may not work as well as it should. Doctors call this insulin resistance, and it increases your risk of getting diabetes. Doctors call this combination of effects on body fat and on sugar and fats in the blood lipodystrophy syndrome.