Premenopausal women meeting operational criteria for idiopathic, acquired, global hypoactive sexual desire disorder were studied in a randomized, double-blind, placebo-controlled, multiple-site escalating dose 112-day trial of bupropion sustained release. Outcome was measured by investigator-rating and self-administered questionnaires. All measures indicated greater sexual responsiveness in women receiving bupropion. The Changes in Sexual Functioning Questionnaire indicated that bupropion had significant effects on increasing measures of sexual arousal, orgasm completion, and sexual satisfaction.