This side effect could be a feeling of drowsiness or increased alertness or a feeling of being worried or anxious. The symptoms can be worse at night and may be accompanied by loss of sleep. Talk to your doctor about the use of sleeping pills. Side effects of efavirenz. To avoid dizziness it is recommended that the drug be taken just before going to bed.
Some people report that they experience particularly vivid dreams on taking efavirenz.
However, few patients stop taking efavirenz because of these psychological side effects, but those that do say that they felt as if they were going crazy. Feeling tired and without energy can be caused by many things, including HIV infection. But it is also a side effect of anti-HIV medication. It appears to be a particular problem of protease inhibitors. If you are feeling tired you should listen to your body and sleep for longer.