Drug interactions
Disopyramide + Maprotiline
Severity: Contraindicated
Disopyramide 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
Both drugs can prolong the QT interval, and combining them raises the risk of torsades de pointes and other serious ventricular arrhythmias. Maprotiline also has quinidine-like conduction effects, and disopyramide is itself strongly proarrhythmic.
What this interaction means in plain words
Disopyramide 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.
Disopyramide belongs to Cardiovascular; Maprotiline belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic QT prolongation and slowed cardiac conduction.
What to do
Avoid the combination and choose an antidepressant with lower QT liability if an antiarrhythmic is required. If it cannot be avoided, obtain a baseline ECG, correct potassium and magnesium, and monitor QTc continuously.
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
- Dofetilide + Maprotiline Contraindicated
- Ibutilide + Maprotiline Contraindicated
- Isocarboxazid + Maprotiline Contraindicated
- Maprotiline + Methylene blue Contraindicated
- Maprotiline + Phenelzine Contraindicated
Other interactions of Disopyramide
- Amisulpride + Disopyramide Contraindicated
- Desipramine + Disopyramide Contraindicated
- Disopyramide + Dronedarone Contraindicated
- Disopyramide + Itraconazole Contraindicated
- Disopyramide + Ketoconazole Contraindicated
- Disopyramide + Moxifloxacin Contraindicated
Frequently asked questions
Can I take Disopyramide with Maprotiline?
MediHelp rates the interaction as contraindicated. Disopyramide 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. Both drugs can prolong the QT interval, and combining them raises the risk of torsades de pointes and other serious ventricular arrhythmias. Maprotiline also has quinidine-like conduction effects, and disopyramide is itself strongly proarrhythmic.
How serious is the interaction between Disopyramide 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 lower QT liability if an antiarrhythmic is required. If it cannot be avoided, obtain a baseline ECG, correct potassium and magnesium, and monitor QTc continuously.
What other medicines interact with Maprotiline?
MediHelp also lists interactions of Maprotiline with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Maprotiline page.
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