title: Letter: Tight-fisted analgesia.
mesh_terms: D000701:Analgesics, Opioid / Q000008:administration & dosage*; D006801:Humans; D007275:Injections, Intravenous; D010149:Postoperative Pain / Q000517:prevention & control*
chemical_list: D000701:Analgesics, Opioid