Drug interactions
Amisulpride + Dofetilide
Severity: Contraindicated
Amisulpride 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
Dofetilide is a class III antiarrhythmic with a substantial risk of torsades de pointes through QT prolongation. Amisulpride adds to this effect and may lead to life-threatening arrhythmia.
What this interaction means in plain words
Amisulpride 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.
Amisulpride belongs to Central Nervous System; Dofetilide belongs to Cardiovascular.
Why it happens
Additive QT prolongation by blockade of the rapid delayed rectifier potassium current.
What to do
Avoid concurrent use and choose an antipsychotic with minimal QT effect. If treatment cannot be changed, ensure continuous ECG monitoring and normal electrolytes.
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 Amisulpride
- Amiodarone + Amisulpride Contraindicated
- Amisulpride + Arsenic trioxide Contraindicated
- Amisulpride + Disopyramide Contraindicated
- Amisulpride + Droperidol Contraindicated
- Amisulpride + Ibutilide Contraindicated
- Amisulpride + Pimozide Contraindicated
Other interactions of Dofetilide
- Amiodarone + Dofetilide Contraindicated
- Amlodipine-hydrochlorothiazide-valsartan + Dofetilide Contraindicated
- Amlodipine-olmesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Captopril-hydrochlorothiazide + Dofetilide Contraindicated
- Chloroquine + Dofetilide Contraindicated
Frequently asked questions
Can I take Amisulpride with Dofetilide?
MediHelp rates the interaction as contraindicated. Amisulpride 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. Dofetilide is a class III antiarrhythmic with a substantial risk of torsades de pointes through QT prolongation. Amisulpride adds to this effect and may lead to life-threatening arrhythmia.
How serious is the interaction between Amisulpride 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: Avoid concurrent use and choose an antipsychotic with minimal QT effect. If treatment cannot be changed, ensure continuous ECG monitoring and normal electrolytes.
What other medicines interact with Amisulpride?
MediHelp also lists interactions of Amisulpride with, for example, Amiodarone, Arsenic trioxide, Disopyramide. The full list is on the Amisulpride page.
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