Drug interactions
Maprotiline + Trifluoperazine
Severity: Major
Maprotiline and Trifluoperazine: 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
Both agents can prolong the QTc interval, raising the risk of torsades de pointes. They also add anticholinergic and sedative effects, and maprotiline and phenothiazines can lower the seizure threshold.
What this interaction means in plain words
Maprotiline and Trifluoperazine 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.
Why it happens
Additive QT prolongation via potassium channel blockade, with additive anticholinergic and CNS effects and possible CYP2D6 inhibition.
What to do
Avoid if possible or use the lowest effective doses. Monitor ECG and electrolytes, and watch for sedation 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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Other interactions of Maprotiline
- Arsenic trioxide + Maprotiline Contraindicated
- Disopyramide + Maprotiline Contraindicated
- Dofetilide + Maprotiline Contraindicated
- Ibutilide + Maprotiline Contraindicated
- Isocarboxazid + Maprotiline Contraindicated
- Maprotiline + Methylene blue Contraindicated
Frequently asked questions
Can I take Maprotiline with Trifluoperazine?
MediHelp rates the interaction as major. Maprotiline and Trifluoperazine 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 agents can prolong the QTc interval, raising the risk of torsades de pointes. They also add anticholinergic and sedative effects, and maprotiline and phenothiazines can lower the seizure threshold.
How serious is the interaction between Maprotiline and Trifluoperazine?
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 possible or use the lowest effective doses. Monitor ECG and electrolytes, and watch for sedation 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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