Heroin.
D004335:Drug and Narcotic Control; D004467:Economics; D003932:Heroin; D006801:Humans; D008691:Methadone / Q000627:therapeutic use; D011639:Public Opinion; D019966:Substance-Related Disorders / Q000188:drug therapy / Q000517:prevention & control*
D003932:Heroin; D008691:Methadone