"Lifetime alcohol users aged 21 or older had a significantly higher rate of past year illicit drug use (13.7 percent) compared with lifetime nondrinkers (2.7 percent). In addition, lifetime alcohol users had significantly higher rates of past year use across all illicit drug categories, with the exception of inhalants (Table 1). Nonmedical use of pain relievers was the illicit drug used most often by lifetime nondrinkers, whereas lifetime alcohol users reported using marijuana most frequently."


"Illicit Drug Use Among Lifetime Nondrinkers and Lifetime Alcohol Users," Office of Applied Programs, Substance Abuse & Mental Health Services Administration, US Dept. of Health and Human Services, June 14, 2005, p. 2.