Patel C V, Koppikar M G, Patel M S, Parulkar G B, Pinto Pereira L M
Br J Clin Pharmacol. 1980 Oct;10 Suppl 2(Suppl 2):351S-354S. doi: 10.1111/j.1365-2125.1980.tb01822.x.
1 Dipyrone 2.5 g was compared with pethidine 100 mg in a double-blind parallel group study. 2 Patients with moderate or severe postoperative pain following abdominal surgery received one of the two drugs intramuscularly. 3 The two treatment groups were homogeneous when analyzed by age, weight, height, sex, and initial severity of pain. 4 The onset degree and duration of pain relief afforded by both drugs was similar when the groups were compared as a whole or according to initial pain level. 5 No side-effects were attributed to either drug in this study.