A comparison of 3 new synthetic analgesics and Demerol.
D000700:Analgesics; D018712:Analgesics, Non-Narcotic / Q000628:therapy*; D058633:Antipyretics; D006801:Humans; D008614:Meperidine / Q000628:therapy*; D011300:Preoperative Care
D000700:Analgesics; D018712:Analgesics, Non-Narcotic; D058633:Antipyretics; D008614:Meperidine
ANALGESICS AND ANTIPYRETICS/therapy; MEPERIDINE/therapy; PREOPERATIVE CARE