Drug interactions
Dacomitinib + Maprotiline
Severity: Major
Dacomitinib and Maprotiline: major 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
Dacomitinib is a strong CYP2D6 inhibitor and may substantially raise maprotiline concentrations. Higher levels increase the risk of QT prolongation, seizures and anticholinergic toxicity.
What this interaction means in plain words
Dacomitinib and Maprotiline can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Dacomitinib belongs to Oncology; Maprotiline belongs to Central Nervous System.
Why it happens
Dacomitinib inhibits CYP2D6, reducing maprotiline metabolism.
What to do
Avoid the combination if possible, or reduce the maprotiline dose and monitor for toxicity and ECG changes. Consider an antidepressant not dependent on CYP2D6.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Maprotiline
- Arsenic trioxide + Maprotiline Contraindicated
- Disopyramide + Maprotiline Contraindicated
- Dofetilide + Maprotiline Contraindicated
- Ibutilide + Maprotiline Contraindicated
- Isocarboxazid + Maprotiline Contraindicated
- Maprotiline + Methylene blue Contraindicated
Other interactions of Dacomitinib
- Dacomitinib + Thioridazine Contraindicated
- Amitriptyline + Dacomitinib Major
- Atomoxetine + Dacomitinib Major
- Brexpiprazole + Dacomitinib Major
- Clomipramine + Dacomitinib Major
- Dacomitinib + Desipramine Major
Frequently asked questions
Can I take Dacomitinib with Maprotiline?
MediHelp rates the interaction as major. Dacomitinib and Maprotiline can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Dacomitinib is a strong CYP2D6 inhibitor and may substantially raise maprotiline concentrations. Higher levels increase the risk of QT prolongation, seizures and anticholinergic toxicity.
How serious is the interaction between Dacomitinib and Maprotiline?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible, or reduce the maprotiline dose and monitor for toxicity and ECG changes. Consider an antidepressant not dependent on CYP2D6.
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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