The most common side effects
Side effects like nausea, diarrhoea and tiredness, are now much less common with modern HIV drugs. If they occur, they usually become easier within the first few weeks.
Very rarely, nausea and tiredness can be a symptom of another illness. This is why you should talk with your doctor about any problems.
However, efavirenz and some integrase inhibitors can affect your mood and cause vivid dreams. These drugs can also affect how well you sleep.
Even though these side effects usually improve, this is why efavirenz is no longer a preferred first choice in UK guidelines.
Last updated: 1 October 2019.