title: Intranasal delivery of morphine may offer better effects.
mesh_terms: D000281:Administration, Intranasal; D000328:Adult; D000701:Analgesics, Opioid / Q000008:administration & dosage* / Q000627:therapeutic use; D001416:Back Pain / Q000188:drug therapy* / Q000209:etiology; D002986:Clinical Trials as Topic; D006801:Humans; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage* / Q000627:therapeutic use; D009369:Neoplasms / Q000150:complications
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine