Drug interactions
Dolasetron + Ibutilide
Severity: Contraindicated
Dolasetron and Ibutilide: contraindicated 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
Ibutilide is a class III antiarrhythmic with a high risk of torsades de pointes, and dolasetron further lengthens the QT interval. The combination can cause life-threatening arrhythmia.
What this interaction means in plain words
Dolasetron and Ibutilide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Dolasetron belongs to Gastrointestinal Tract; Ibutilide belongs to Cardiovascular.
Why it happens
Additive prolongation of ventricular repolarization.
What to do
Do not use dolasetron around ibutilide administration. Choose an antiemetic without QT effect and maintain continuous ECG monitoring during ibutilide therapy.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Dolasetron
- Apomorphine + Dolasetron Contraindicated
- Dofetilide + Dolasetron Contraindicated
- Dolasetron + Pimozide Contraindicated
- Dolasetron + Thioridazine Contraindicated
- Dolasetron + Vandetanib Contraindicated
- Dolasetron + Ziprasidone Contraindicated
Other interactions of Ibutilide
- Amiodarone + Ibutilide Contraindicated
- Amisulpride + Ibutilide Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Clarithromycin + Ibutilide Contraindicated
- Desipramine + Ibutilide Contraindicated
- Dronedarone + Ibutilide Contraindicated
Frequently asked questions
Can I take Dolasetron with Ibutilide?
MediHelp rates the interaction as contraindicated. Dolasetron and Ibutilide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Ibutilide is a class III antiarrhythmic with a high risk of torsades de pointes, and dolasetron further lengthens the QT interval. The combination can cause life-threatening arrhythmia.
How serious is the interaction between Dolasetron and Ibutilide?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not use dolasetron around ibutilide administration. Choose an antiemetic without QT effect and maintain continuous ECG monitoring during ibutilide therapy.
What other medicines interact with Dolasetron?
MediHelp also lists interactions of Dolasetron with, for example, Apomorphine, Dofetilide, Pimozide. The full list is on the Dolasetron page.
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