Drug interactions
Misoprostol + Oxytocin
Severity: Major
Misoprostol and Oxytocin: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Misoprostol sensitizes the uterus to oxytocin, and giving oxytocin shortly after misoprostol may cause uterine hyperstimulation. This can lead to fetal distress and, rarely, uterine rupture.
What this interaction means in plain words
Misoprostol and Oxytocin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Misoprostol belongs to Gastrointestinal Tract; Oxytocin belongs to Endocrine.
Why it happens
Additive uterotonic effects through prostaglandin E1 and oxytocin receptor pathways.
What to do
Delay oxytocin start for at least 4 hours after the last misoprostol dose and monitor uterine activity and fetal heart rate continuously.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Misoprostol
Other interactions of Oxytocin
Frequently asked questions
Can I take Misoprostol with Oxytocin?
MediHelp rates the interaction as major. Misoprostol and Oxytocin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Misoprostol sensitizes the uterus to oxytocin, and giving oxytocin shortly after misoprostol may cause uterine hyperstimulation. This can lead to fetal distress and, rarely, uterine rupture.
How serious is the interaction between Misoprostol and Oxytocin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Delay oxytocin start for at least 4 hours after the last misoprostol dose and monitor uterine activity and fetal heart rate continuously.
What other medicines interact with Misoprostol?
MediHelp also lists interactions of Misoprostol with, for example, Aluminum hydroxide / magnesium carbonate, Aluminum hydroxide / magnesium trisilicate, Citric acid / glucono-delta-lactone / magnesium carbonate. The full list is on the Misoprostol page.
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