Biobehavioral Interventions for HIV-negative, Stimulant Using Men Who Have Sex With Men

Inclusion Criteria: * Male who has sex with other men (MSM) by self-report * At least 18 years of age * HIV-negative serostatus on baseline rapid oral HIV antibody test, and no signs or symptoms consistent with primary HIV infection (PHI) * Self-reported stimulant use within the previous 30 days * Self-report of unprotected anal intercourse (either receptive or insertive) with an HIV-positive or status unknown partner within the previous 3 months * Self-report of no previous hypersensitivity to any of the components of Truvada (tenofovir disoproxil fumarate or emtricitabine) * In the opinion of the study medical provider, no contraindication to PEP medication treatment (laboratory testing, medical/drug interaction, or other) * Has not used PEP in the previous 6 months * A current resident of Los Angeles County * Does not have a plan to move away from Los Angeles County in the next 6 months * Willing and able to provide informed consent * Willing and able to comply with study requirements Exclusion Criteria: * Does not identify as a male who has sex with other men * Under 18 years of age * HIV positive by self-report or as indicated by the results on baseline rapid oral HIV antibody testing * Has not used a stimulant in the previous 30 days by self-report * Has not had unprotected anal intercourse (either receptive or insertive) with an HIV-positive or status unknown partner within the previous 3 months * Creatinine clearance \<30 ml/min and not on dialysis * Self-reports a…