Systematic review and meta-analysis of randomized controlled trials of atosiban versus nifedipine for inhibition of preterm labor.

Background: Two tocolytic drugs-atosiban and nifedipine-are currently used for first-line treatment of preterm labor (PTL).

Objective: To compare the efficacy and safety of atosiban with nifedipine for PTL treatment.

Search Strategy: In May 2017, we searched PubMed, Scopus, Web of Science, and Cochrane Central Register of Controlled Clinical Trials with search terms including "nifedipine", "atosiban", and "preterm labor".