Because of possible additive or interactive drug effects, data from SAMHSA's 2006 and 2007 National Surveys on Drug Use and Health were pooled to examine the likelihood of multiple concurrent substance use. The measure used to define concurrent substance use for this report was illicit drug use during or within 2 hours of last alcohol use.
About 6% (7.1 million) of persons age 12 or older who drank alcohol in the past month also reported using an illicit drug during or within 2 hours of their last alcohol drink.
Among past month alcohol drinkers, American Indian or Alaska Natives (11.7%) and Blacks (9.9%) were the most likely racial groups and Native Hawaiian or Other Pacific Islanders (4.2%) and Asians (2.1%) were the least likely racial groups to use an illicit drug concurrently with alcohol.
Youth aged 12 to 17 and young adults aged 18 to 25 were more likely than older persons among the past month alcohol drinkers to drink alcohol concurrently with an illicit drug.
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