The primary purpose of this study was to test the whether high-risk, HIV-seronegative persons with mild-to-moderate depression would be more likely to adopt protective behavior change when provided with pharmacotherapy for their depression than when treated with placebo. High-risk behaviors include using illegal drugs and participating in unprotected sexual intercourse. The specific pharmacotherapy used in this study was the anti-depressant, bupropion. The subject population consisted of HIV negative men who have sex with men (MSM) with mild-to-moderate depression.