Drug interactions
Cisapride + Dofetilide
Severity: Contraindicated
Cisapride and Dofetilide: 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
Both drugs prolong the QT interval, and dofetilide itself carries a substantial risk of torsades de pointes. Combined use markedly increases the chance of life-threatening ventricular arrhythmia.
What this interaction means in plain words
Cisapride and Dofetilide 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.
Cisapride belongs to Gastrointestinal Tract; Dofetilide belongs to Cardiovascular.
Why it happens
Additive blockade of the cardiac hERG potassium current, prolonging repolarization.
What to do
Do not use together; choose a prokinetic or antiemetic without QT effects in patients on dofetilide.
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 Cisapride
- Apomorphine + Cisapride Contraindicated
- Artemether + Cisapride Contraindicated
- Azithromycin + Cisapride Contraindicated
- Ceritinib + Cisapride Contraindicated
- Chloroquine + Cisapride Contraindicated
- Cisapride + Citalopram Contraindicated
Other interactions of Dofetilide
- Amiodarone + Dofetilide Contraindicated
- Amisulpride + Dofetilide Contraindicated
- Amlodipine-hydrochlorothiazide-valsartan + Dofetilide Contraindicated
- Amlodipine-olmesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Captopril-hydrochlorothiazide + Dofetilide Contraindicated
Frequently asked questions
Can I take Cisapride with Dofetilide?
MediHelp rates the interaction as contraindicated. Cisapride and Dofetilide 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. Both drugs prolong the QT interval, and dofetilide itself carries a substantial risk of torsades de pointes. Combined use markedly increases the chance of life-threatening ventricular arrhythmia.
How serious is the interaction between Cisapride and Dofetilide?
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 together; choose a prokinetic or antiemetic without QT effects in patients on dofetilide.
What other medicines interact with Cisapride?
MediHelp also lists interactions of Cisapride with, for example, Apomorphine, Artemether, Azithromycin. The full list is on the Cisapride page.
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