title: Drugs as reinforcers in monkey and man.
mesh_terms: D000818:Animals; D003061:Codeine / Q000494:pharmacology; D004195:Disease Models, Animal; D004358:Drug Therapy; D000882:Haplorhini; D006556:Heroin Dependence / Q000209:etiology; D006801:Humans; D007880:Legislation, Drug; D008691:Methadone / Q000494:pharmacology; D009020:Morphine / Q000276:immunology; D010423:Pentazocine / Q000494:pharmacology; D012055:Reinforcement Schedule; D012054:Reinforcement, Psychology; D019966:Substance-Related Disorders; D014481:United States
chemical_list: D009020:Morphine; D010423:Pentazocine; D008691:Methadone; D003061:Codeine