title: Oral methadone for relief of chronic pain from cancer.
mesh_terms: D002908:Chronic Disease; D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D009020:Morphine / Q000627:therapeutic use; D009369:Neoplasms / Q000150:complications*; D010148:Intractable Pain / Q000188:drug therapy*
chemical_list: D009020:Morphine; D008691:Methadone