title: Definitions related to the use of opioids for the treatment of pain.
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D002908:Chronic Disease; D006801:Humans; D010146:Pain / Q000188:drug therapy*; D012955:Societies, Medical; D019966:Substance-Related Disorders / Q000209:etiology; D009626:Terminology as Topic; D014481:United States
chemical_list: D000701:Analgesics, Opioid