• Hilary H Spindler, Susan Scheer, Sanny Y Chen, Jeffrey D Klausner, Mitchell H Katz, Linda A Valleroy, and Sandra K Schwarcz.
• San Francisco Department of Public Health, San Francisco, California, USA. hilary.spindler@gmail.com
• Sex Transm Dis. 2007 Aug 1; 34 (8): 586-91.

ObjectivesTo determine the prevalence and factors of Viagra use in combination with crystal methamphetamine and its association with HIV risk behavior in a probability sample of men who have sex with men (MSM).Study DesignA cross-sectional, random-digit dial telephone survey of MSM in San Francisco conducted between June 2002 and January 2003.ResultsOf the 1976 MSM, 13.5% used Viagra alone, 7.1% used methamphetamine without Viagra, 9.6% used Viagra with a mood-altering substance (excluding methamphetamine), and 5.1% used Viagra with methamphetamine. Of the MSM using Viagra with methamphetamine, 57% were HIV-infected and 24% of these men reported serodiscordant unprotected insertive intercourse. Viagra used with methamphetamine was independently associated with a higher risk of serodiscordant unprotected insertive intercourse, serodiscordant unprotected receptive intercourse, and a recent diagnosis of a sexually transmitted disease.ConclusionMSM who use Viagra with crystal methamphetamine have high prevalence rates of HIV and engage in HIV risk behaviors.

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