“…Club drugs, such as crystal methamphetamine and ecstasy, can inhibit an erection if used at high doses (Drumright, Patterson, & Strathdee, 2006b). Studies of ED drug use in conjunction with club drugs to counteract sexual side effects has been associated with HIV and STI transmission risk and riskier sexual behaviors, such as UAI (Fisher et al, 2006; Fisher, Reynolds, Ware, & Napper, 2011; Prestage et al, 2009b). In two online studies of MSM and HIV transmission risk, risk factors associated with crystal methamphetamine use before sex included young age, having an STI, and being HIV-positive (Hirshfield et al, 2004; Hirshfield, Remien, & Chiasson, 2006).…”