The study group received 0.5 mg per kilogram of meperidine plus 2.5 g of dipyrone n = 57, and the control group received the usual dose of 1 mg per kilogram of meperidine n = 50.
Se usaron dosis de 0,5 mg/kg de meperidina más 2,5 g de dipirona n = 57, comparadas con la dosis usual de meperidina de 1 mg/kg n = 50.