December 12, 2005—HIV positive people who take Sustiva and experience nightmares say the bad visions mostly go away after four weeks of treatment, according to a new study published in the November 15 issue of Annals of Internal Medicine. Subjects in the study took a variety of meds, without knowing which pills they were on. Sustiva-takers who experienced bad dreams the first week reported experiences similar to other subjects by week four.