Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2019;41(2):84-89
To compare low doses of pethidine with dipyrone in labor analgesia.
In a randomized prospective study conducted by Universidade de Fortaleza, in the state of Ceará, Brazil, between May and December 2016, 200 full-term parturients, with very painful uterine contractions and exhibiting uterine cervix dilatation ≥ 5 cm, were selected to receive a single intravenous dose of either 0.25 mg/kg of pethidine (n = 100) or of 25 mg/kg of dipyrone (n = 100). Pain was assessed using the visual analogue scale. The data were analyzed using the Student t-test, the chi-square test and the likelihood ratio.
There was a significant improvement in pain in 35% of the parturients. Both drugs presented a similar analgesic effect 1 hour after the intervention (p = 0.692). There was no analgesic effect during the evaluation of the second hour after the intervention with pethidine or dipyrone. There were no adverse effects, such as maternal drowsiness, nausea or vomiting, related to the drugs used.
Pethidine in low doses and dipyrone presented equivalent analgesia during labor. Public Registry of Clinical Trials.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2017;39(12):686-691
To verify if pethidine is safe for the conceptus when used during labor.
Systematic review in the Capes Periodicals/PubMed and MEDLINE/Virtual Health Library (BVS, in the Portuguese acronym) databases.
A total of 17 studies published from January 1st, 2000, to September 2nd, 2016, with a total of 1,688 participants involved were included in the present review. There was no record of conceptus vitality decrease associated with low doses of pethidine being administered to mothers during labor.
Intramuscular (IM) or intravenous (IV) pethidine at low doses, of up to 50 mg, is safe to administer during labor.