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Do tocolytic agents stop preterm labor? A critical and comprehensive review of efficacy and safety

K Higby, C J Pauerstein, E M Xenakis

  • The University of Texas Health Science Center at San Antonio ROR

American Journal of Obstetrics and Gynecology, 168(4), 1247-1259

DOI 10.1016/0002-9378(93)90376-t PMID 8097367

Abstract

Objective

Our aim was to determine the efficacy and safety of tocolytic agents currently used to treat premature labor.

Study Design

We carried out a comprehensive review of tocolytic agents in the treatment of premature labor. Three hundred twenty-eight studies published between 1933 and 1992 were analyzed.

Results

An analysis of randomized, placebo-controlled, clinical trials showed that magnesium sulfate is not better than placebo in the treatment of premature labor. beta-Adrenergic receptor agonists effectively stop premature labor for only 24 to 48 hours. Calcium channel blockers and oxytocin antagonists inhibit uterine contractions, but their role in stopping labor is undefined. Prostaglandin inhibitors appear to be effective in treating premature labor and have few adverse side effects.

Conclusions

The only tocolytic drugs that might be effective are the prostaglandin inhibitors. Tocolytic agents should be used only between 24 and 32 completed weeks of gestation. Magnesium sulfate should not be used to treat premature labor. Oxytocin antagonists should be used only in experimental clinical trials. Calcium channel blockers and beta-adrenergic receptor agonists inhibit uterine contractions but do not prolong gestation for longer than 48 hours.

Topics

Pregnancy > Preterm Labor > Tocolytic TherapyResearch Methodology > Systematic Review > Drug EfficacyGeneral OB/GYN > Pharmacology > Uterine Relaxants
tocolytic agents efficacy preterm labor systematic review, magnesium sulfate versus placebo premature labor, beta adrenergic agonists tocolysis 48 hours, prostaglandin inhibitors preterm labor treatment effectiveness, calcium channel blockers oxytocin antagonists uterine contractions, tocolytic drug safety comprehensive review, ritodrine terbutaline preterm labor outcomes, Higby Pauerstein tocolytic agents critical review, gestational age limits tocolytic therapy 24 to 32 weeks, magnesium sulfate ineffective premature labor evidence
PMID 8097367 8097367 DOI 10.1016/0002-9378(93)90376-t 10.1016/0002-9378(93)90376-t

Cite this article

Higby, K., Xenakis, E. M., & Pauerstein, C. J. (1993). Do tocolytic agents stop preterm labor? A critical and comprehensive review of efficacy and safety. *American journal of obstetrics and gynecology*, *168*(4), 1247-1259. https://doi.org/10.1016/0002-9378(93)90376-t

Keywords

Adrenergic beta-Agonists/therapeutic Use, Calcium Channel Blockers/therapeutic Use, Female, Humans, Magnesium Sulfate/therapeutic Use, Obstetric Labor, Premature/prevention & Control, Oxytocin/antagonists & Inhibitors, Pregnancy, Prostaglandin Antagonists/therapeutic Use, Randomized Controlled Trials As Topic, Tocolytic Agents/adverse Effects/therapeutic Use, Adrenergic beta-Agonists, Calcium Channel Blockers, Prostaglandin Antagonists, Tocolytic Agents, Oxytocin, Magnesium Sulfate

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