title: Methadone substitution.
mesh_terms: D003932:Heroin; D006556:Heroin Dependence / Q000188:drug therapy; D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D019966:Substance-Related Disorders / Q000188:drug therapy*
chemical_list: D003932:Heroin; D008691:Methadone