Drug interactions
Dofetilide + Haloperidol
Severity: Contraindicated
Dofetilide and Haloperidol: 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 markedly prolongs the QT interval and carries a high risk of torsades de pointes, which haloperidol compounds. The combination can result in life-threatening arrhythmias.
What this interaction means in plain words
Dofetilide and Haloperidol 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 belongs to Cardiovascular; Haloperidol belongs to Central Nervous System.
Why it happens
Additive QT prolongation through potassium channel (hERG) blockade.
What to do
Avoid the combination; choose an alternative antipsychotic with minimal QT effect or a different antiarrhythmic. If unavoidable, give dofetilide only in a monitored setting with continuous ECG.
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 Haloperidol
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
- Haloperidol + Ziprasidone 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 Dofetilide with Haloperidol?
MediHelp rates the interaction as contraindicated. Dofetilide and Haloperidol 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 markedly prolongs the QT interval and carries a high risk of torsades de pointes, which haloperidol compounds. The combination can result in life-threatening arrhythmias.
How serious is the interaction between Dofetilide and Haloperidol?
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 the combination; choose an alternative antipsychotic with minimal QT effect or a different antiarrhythmic. If unavoidable, give dofetilide only in a monitored setting with continuous ECG.
What other medicines interact with Haloperidol?
MediHelp also lists interactions of Haloperidol with, for example, Dronedarone, Ibutilide, Levoketoconazole. The full list is on the Haloperidol page.
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