The potential for rapid spread of Human Immunodeficiency Virus (HIV) among intravenous drug users is high because of shared drug needles. As long as intravenous drug users are addicted, they will be at risk for contracting AIDS. Therefore, the primary way to prevent AIDS is the treatment of drug addicts. Drug abuse treatment resources should be expanded and outreach programs developed to encourage drug abusers to enter treatment. AIDS risk-reduction counseling must be provided to intravenous drug abusers who continue injecting drugs and to addicts' sexual partners to prevent the spread of HIV. 50 references. (Author abstract modified)