- To be eligible for the study, participants must be: (a) female; (b) report use of at least two drugs—alcohol, marijuana, methamphetamine (tik), Mandrax (methaqualone), cocaine (crack and/or powder), heroin (Thai White), glue, MDMA (ecstasy), or LSD—at least once a week in the past 90 days; (c) be sexually active within the past 30 days with a male partner; (d) be aged 18 to 33 years; (e) live in the communities around the airport; and (f) provide verbal consent to be screened for eligibility and written consent to participate in the study.