title: Double-blind evaluation of butorphanol and meperidine given intramuscularly before anesthesia.
mesh_terms: D000328:Adult; D000368:Aged; D000758:Anesthesia; D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D005260:Female; D006801:Humans; D007273:Injections, Intramuscular; D008297:Male; D008614:Meperidine / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D008875:Middle Aged; D009019:Morphinans / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D011229:Preanesthetic Medication; D013997:Time Factors
chemical_list: D009019:Morphinans; D008614:Meperidine