title: Drug dependence in the elderly.
mesh_terms: D000367:Age Factors; D000368:Aged; D000437:Alcoholism / Q000453:epidemiology*; D005260:Female; D006556:Heroin Dependence / Q000188:drug therapy; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use; D008875:Middle Aged; D009519:New York City; D011379:Prognosis; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders / Q000453:epidemiology*
chemical_list: D008691:Methadone