ReproductiveInvestigational

Atosiban

Intravenous

Overview

A competitive oxytocin/vasopressin V1a receptor antagonist used as a tocolytic agent to delay preterm labor. Atosiban blocks oxytocin-mediated myometrial contractions without the cardiovascular side effects associated with beta-adrenergic tocolytics.

Mechanism of Action

The peptide is administered as an initial bolus followed by a step-down infusion protocol over up to 48 hours..

Research Summary & Key Findings

Approved in Europe and many countries worldwide (not FDA-approved in the US). Clinical trials demonstrated efficacy in delaying delivery by 48 hours to allow corticosteroid administration for fetal lung maturity. Superior safety profile compared to beta-agonist tocolytics, with significantly fewer maternal cardiovascular side effects (Flenady et al., Cochrane Review, 2014).

Clinical Status

Investigational

Atosiban is in the investigational stage. While preclinical and early-phase data exist, it has not received regulatory approval for clinical use in the United States.

Administration Routes

Intravenous

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Disclaimer: This information is provided for educational and research purposes only. It is not intended as medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any peptide therapy. The Peptide Association does not endorse or recommend any specific treatment protocol.