“…It is unclear if young adults are having sex under the influence of only prescription drugs or if they are combining prescription drugs with alcohol or other illicit drugs. The combination of prescription drugs with alcohol, illicit drugs, and other prescription drugs is common among young adults (Kelly, Wells, Pawson, LeClair, & Parsons, in press; McCabe, Cranford, Morales, & Young, 2006; McCabe, West, Teter, & Boyd, 2012; Nakawaki & Crano, 2012) for a variety of reasons, including to ‘come down’ from stimulants (methamphetamine, cocaine, and MDMA; Boeri, Sterk, Bahora, & Elifson, 2008) or to enhance the effects of alcohol, illicit drugs, or other prescription drugs (Boeri, Sterk, Bahora, & Elifson, 2008; Jones, Mogali, & Comer, 2012; Quintero, 2009; Zacny & Gutierrez, 2011). Further, research indicates that prescription drug and illicit substance use disorders often co-occur (Blanco et al, 2007; McCabe, Cranford, & West, 2008), further indicating that these combinations of drugs are worthy of additional examination.…”