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Dosage GuideResearch Reference

Atosiban Dosage

Research-based dosing protocols, timing guidance, and reconstitution reference for Atosiban. All information is for educational purposes only.

Quick Answer

Atosiban is administered intravenously in a three-stage protocol: an initial 6.75 mg bolus, followed by a 3-hour infusion at 18 mg/hr, then a 45-hour infusion at 6 mg/hr. The total maximum dose is 330 mg. This protocol aims to rapidly achieve and maintain therapeutic levels for tocolysis.

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Table of Contents

Standard Dosage Range

Research dosing range: 6.75 mg bolus, then 18 mg/hr for 3 hours, then 6 mg/hr for up to 45 hours

Educational reference only

These dosage ranges are derived from preclinical research and community protocols. No human clinical dose-ranging trials have established therapeutic doses for most research peptides. Always consult a qualified healthcare provider before starting any peptide protocol.

Dosage by Use Case

Preterm Labor (24-33 weeks gestation)

6.75 mg bolusOnce, followed by infusion
Duration

Up to 48 hours

Standard tocolytic protocol. Administer initial bolus over 1 minute, then proceed with the two-stage infusion protocol. Monitor uterine contractions and maternal vital signs closely.

Preterm Labor - Infusion Stage 1

18 mg/hrContinuous infusion
Duration

3 hours

Continue monitoring for uterine contractions. Adjust infusion rate per hospital protocol only under direct physician supervision. Maintain close communication with obstetrics team.

Preterm Labor - Infusion Stage 2

6 mg/hrContinuous infusion
Duration

Up to 45 hours

Reduce infusion rate to maintenance dose. Total treatment duration (infusion stages) should not exceed 48 hours. Corticosteroids are typically administered during this window to promote fetal lung maturation.

Assisted Reproductive Technology (ART)

Variable, off-labelSingle dose before/during embryo transfer
Duration

Single dose

Dosing is not standardized for ART. Some clinics administer a single low dose bolus (e.g. 3.75 mg) prior to embryo transfer to reduce uterine contractions. This is an off-label use; efficacy is not fully established.

Timing & Frequency

For preterm labor, atosiban is administered as soon as preterm labor is diagnosed and is continued for up to 48 hours to allow for corticosteroid administration. For ART, administration timing varies based on clinic protocol.

Cycle Guidance

Atosiban is typically administered as a single course of treatment for preterm labor. Repeated courses are not well-studied. For ART, single doses are used during the embryo transfer procedure.

Reconstitution Reference

Quick reference for reconstituting Atosiban. For custom vial sizes and concentrations, use the Reconstitution Calculator.

Common Vial SizeVials typically contain 7.5 mg/mL or 37.5 mg/5mL
BAC Water VolumeNot applicable; supplied as a ready-to-use solution
Concentration & DrawTypically 7.5 mg/mL
StorageStore at refrigerated temperatures (2–8°C). Protect from light.
StabilityStable until expiration date when stored correctly. Do not freeze.
Use the Reconstitution Calculator → for precise injection volumes based on your exact vial size, water volume, and desired dose.

Frequently Asked Questions

What is the standard atosiban dosage for preterm labor?
The standard protocol involves a 6.75 mg intravenous bolus, followed by an 18 mg/hour infusion for 3 hours, then a 6 mg/hour infusion for up to 45 hours, not exceeding a total dose of 330 mg.
How is atosiban administered?
Atosiban is administered intravenously as a bolus injection followed by a continuous infusion. It is supplied as a ready-to-use solution; no reconstitution is required.
How long does atosiban treatment last?
Atosiban treatment for preterm labor typically lasts up to 48 hours. This duration is designed to allow for the administration of corticosteroids to promote fetal lung maturation.
Is atosiban used for anything other than preterm labor?
Atosiban is also being investigated for improving IVF implantation rates by reducing uterine contractions during embryo transfer, but this is an off-label use.
What should I do if contractions recur after atosiban treatment?
If contractions recur, consult with your healthcare provider. Repeated courses of atosiban are possible, but the benefit is not well-established. Other tocolytic agents may also be considered.

References

  1. 1
    Atosiban versus beta-agonists for the treatment of preterm labour: a randomised controlled trial(2001)PubMed ↗
  2. 2
    Nifedipine versus atosiban in the treatment of threatened preterm labour (APOSTEL III trial)(2013)PubMed ↗
  3. 3
    Atosiban for threatened preterm labor.(1999)PubMed ↗

Last updated: 2026-02-19