Drug interactions
Dofetilide + Maprotiline
Severity: Contraindicated
Dofetilide and Maprotiline: 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 causes dose-related QT prolongation and torsades de pointes, and maprotiline adds to this risk. The combination may lead to life-threatening arrhythmia.
What this interaction means in plain words
Dofetilide and Maprotiline 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; Maprotiline belongs to Central Nervous System.
Why it happens
Additive QT prolongation through delayed cardiac repolarization.
What to do
Avoid the combination and choose an antidepressant with minimal QT effect. Dofetilide is started under continuous ECG monitoring in hospital.
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 Maprotiline
- Arsenic trioxide + Maprotiline Contraindicated
- Disopyramide + Maprotiline Contraindicated
- Ibutilide + Maprotiline Contraindicated
- Isocarboxazid + Maprotiline Contraindicated
- Maprotiline + Methylene blue Contraindicated
- Maprotiline + Phenelzine 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 Maprotiline?
MediHelp rates the interaction as contraindicated. Dofetilide and Maprotiline 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 causes dose-related QT prolongation and torsades de pointes, and maprotiline adds to this risk. The combination may lead to life-threatening arrhythmia.
How serious is the interaction between Dofetilide and Maprotiline?
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 and choose an antidepressant with minimal QT effect. Dofetilide is started under continuous ECG monitoring in hospital.
What other medicines interact with Maprotiline?
MediHelp also lists interactions of Maprotiline with, for example, Arsenic trioxide, Disopyramide, Ibutilide. The full list is on the Maprotiline page.
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