Memantine for AIDS dementia complex: open-label report of ACTG 301.

AbstractObjective: To evaluate the long-term safety and efficacy of memantine use as treatment of HIV-associated cognitive impairment.Background: The results of a 20-week, randomized, double-blind, placebo-controlled trial of memantine in HIV-infected participants with cognitive impairment (ACTG 301) were previously reported. We report the results of the up-to-60-week open-label phase following the double-blind phase.Method: Participants received open-label memantine and were escalated to a 40 mg/day dose or their maximum tolerated dose in the double- blind phase. Adverse experiences were used to evaluate safety, and changes in the mean of eight neuropsychological test scores (NPZ-8) were used to evaluate efficacy.Results: Ninety-nine participants entered the initial 12-week openlabel phase and 45 in the additional 48-week extension. Twenty-seven participants reported severe adverse experiences. During the initial 12-week open-label phase, participants randomized to memantine in the double-blind phase had...