Drug interactions
Ibutilide + Maprotiline
Severity: Contraindicated
Ibutilide 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
Ibutilide markedly prolongs repolarisation and carries a significant risk of torsades de pointes. Adding maprotiline, which also lengthens the QT interval, further increases the likelihood of life-threatening ventricular arrhythmia.
What this interaction means in plain words
Ibutilide 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.
Ibutilide belongs to Cardiovascular; Maprotiline belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic prolongation of the QT interval.
What to do
Do not give ibutilide to patients taking maprotiline; consider an alternative cardioversion strategy such as electrical cardioversion. Review the need for maprotiline if rhythm control with QT-prolonging agents is planned.
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
- Dofetilide + Maprotiline Contraindicated
- Isocarboxazid + Maprotiline Contraindicated
- Maprotiline + Methylene blue Contraindicated
- Maprotiline + Phenelzine Contraindicated
Other interactions of Ibutilide
- Amiodarone + Ibutilide Contraindicated
- Amisulpride + Ibutilide Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Clarithromycin + Ibutilide Contraindicated
- Desipramine + Ibutilide Contraindicated
- Dolasetron + Ibutilide Contraindicated
Frequently asked questions
Can I take Ibutilide with Maprotiline?
MediHelp rates the interaction as contraindicated. Ibutilide 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. Ibutilide markedly prolongs repolarisation and carries a significant risk of torsades de pointes. Adding maprotiline, which also lengthens the QT interval, further increases the likelihood of life-threatening ventricular arrhythmia.
How serious is the interaction between Ibutilide 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: Do not give ibutilide to patients taking maprotiline; consider an alternative cardioversion strategy such as electrical cardioversion. Review the need for maprotiline if rhythm control with QT-prolonging agents is planned.
What other medicines interact with Maprotiline?
MediHelp also lists interactions of Maprotiline with, for example, Arsenic trioxide, Disopyramide, Dofetilide. The full list is on the Maprotiline page.
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