I have a few patients on Sustiva, and they have experienced some of these symptoms. The symptoms improve in most people after several weeks of taking the drug. Dividing the dose by taking two pills at night and one pill during the day has helped. Also, short-term use of a sleeping pill can help with the insomnia. Low magnesium levels are usually due to fluid and electrolyte imbalance that can be caused by severe diarrhea.
Dehydration can also cause fainting and dizziness.
Usually IV fluid replacement can help the problem. I hope your friend can hang in there. Experts appearing on this page are independent and are solely responsible for editing and fact-checking their material. Neither The Body nor any sponsor is the publisher or speaker of posted visitors' questions or the experts' material. Questions and messages posted to this forum are not statements of advice,opinion, or information of The Body, Body Health Resources Corporation or any sponsor of this forum.