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Nifedipine versus ritodrine for suppressing preterm labor.
W R Meyer1, H W Randall, W L Graves
1Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia.
The Journal of Reproductive Medicine
|June 1, 1990
Summary
Oral nifedipine demonstrated similar tocolytic efficacy to intravenous ritodrine hydrochloride for preterm labor, with fewer adverse effects. Nifedipine presents a safe and effective alternative, particularly when beta-sympathomimetics are contraindicated.
Area of Science:
- Obstetrics and Gynecology
- Pharmacology
Background:
- Preterm labor is a significant concern in obstetrics.
- Beta-sympathomimetics like ritodrine hydrochloride are commonly used tocolytic agents.
- Concerns exist regarding the adverse effects of traditional tocolytic therapies.
Purpose of the Study:
- To compare the efficacy and safety of oral nifedipine versus intravenous ritodrine hydrochloride in managing preterm labor.
- To evaluate the maternal and fetal side effects associated with each tocolytic agent.
- To assess the impact of nifedipine on umbilical blood flow.
Main Methods:
- A randomized controlled trial involving fifty-eight women in preterm labor.
- Participants received either oral nifedipine or intravenous ritodrine hydrochloride.
- Doppler studies were conducted to assess umbilical blood flow.
Main Results:
- Nifedipine exhibited comparable tocolytic efficacy to ritodrine hydrochloride.
- Nifedipine was associated with fewer adverse maternal and fetal side effects.
- Nifedipine showed an insignificant effect on umbilical blood flow.
Conclusions:
- Oral nifedipine is a safe, effective, and well-tolerated tocolytic agent.
- Nifedipine may serve as a suitable alternative to ritodrine hydrochloride.
- Nifedipine is particularly beneficial for patients where beta-sympathomimetics are contraindicated.