title: A patient looks at pain and analgesia.
mesh_terms: D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004334:Drug Administration Schedule; D006801:Humans; D008614:Meperidine / Q000627:therapeutic use; D009020:Morphine / Q000627:therapeutic use; D010146:Pain / Q000188:drug therapy* / Q000209:etiology
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine; D008614:Meperidine