Drug interactions
Fluphenazine + Maprotiline
Severity: Major
Fluphenazine and Maprotiline: major interaction.
Last updated Sources: Base de donnees publique des medicaments (France)
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 may prolong the QT interval, so combined use raises the risk of arrhythmia. Fluphenazine can inhibit CYP2D6 and raise maprotiline levels, and the combination adds anticholinergic and seizure-threshold effects.
What this interaction means in plain words
Fluphenazine 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.
Fluphenazine belongs to Central Nervous System; Maprotiline belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with CYP2D6 inhibition raising maprotiline exposure.
What to do
Avoid if an alternative is available. If combined, monitor ECG and electrolytes and watch for anticholinergic effects and seizures.
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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References
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 Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Fluphenazine with Maprotiline?
MediHelp rates the interaction as major. Fluphenazine 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. Both drugs may prolong the QT interval, so combined use raises the risk of arrhythmia. Fluphenazine can inhibit CYP2D6 and raise maprotiline levels, and the combination adds anticholinergic and seizure-threshold effects.
How serious is the interaction between Fluphenazine 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 if an alternative is available. If combined, monitor ECG and electrolytes and watch for anticholinergic effects and seizures.
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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