The Stonewall Project is an outpatient substance abuse treatment program for methamphetamine-using MSM that includes individual counseling, group counseling, and visits with a psychiatrists where indicated.

Participants will complete a self-report measure that assesses substance use during the past month. We will examine the total number of days that stimulants (cocaine, crack, or methamphetamine) were used during the past month. We will also conduct urine toxicology screening to determine whether participants test positive for cocaine or methamphetamine metabolites at each study visit. This is an objective measure of recent stimulant use (i.e., during the past 72 hours).

Sexual risk taking will be assessed using a measure that allows our team to examine risk as a function of HIV status, partner type (i.e., insertive or receptive), and whether the participant was under the influence of methamphetamine. Sex risk for HIV-negative men will be defined as any unprotected anal intercourse, irrespective of the HIV serostatus of sex partners. Sex risk for HIV-positive men will be defined as unprotected anal intercourse with HIV-negative or unknown serostatus partners.