Polydrug abuse or multidrug misuse: it's here to stay.
D000293:Adolescent; D000328:Adult; D000428:Alcohol Drinking; D006556:Heroin Dependence; D006801:Humans; D008691:Methadone; D009294:Narcotics; D019966:Substance-Related Disorders; D014481:United States
D009294:Narcotics; D008691:Methadone