Drug interactions
Trimipramine + Tropisetron
Severity: Moderate
Trimipramine and Tropisetron: moderate 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
Tropisetron, like other 5-HT3 antagonists, can prolong the QT interval, and trimipramine adds to this effect. The combination may raise the risk of torsades de pointes, particularly with electrolyte disturbances.
What this interaction means in plain words
Trimipramine and Tropisetron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive prolongation of cardiac repolarization.
What to do
Correct potassium and magnesium and obtain an ECG when other risk factors exist. Choose an antiemetic with less QT effect if the QTc is prolonged.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Trimipramine
- Disopyramide + Trimipramine Contraindicated
- Dofetilide + Trimipramine Contraindicated
- Ibutilide + Trimipramine Contraindicated
- Isocarboxazid + Trimipramine Contraindicated
- Pentamidine + Trimipramine Contraindicated
- Phenelzine + Trimipramine Contraindicated
Frequently asked questions
Can I take Trimipramine with Tropisetron?
MediHelp rates the interaction as moderate. Trimipramine and Tropisetron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Tropisetron, like other 5-HT3 antagonists, can prolong the QT interval, and trimipramine adds to this effect. The combination may raise the risk of torsades de pointes, particularly with electrolyte disturbances.
How serious is the interaction between Trimipramine and Tropisetron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Correct potassium and magnesium and obtain an ECG when other risk factors exist. Choose an antiemetic with less QT effect if the QTc is prolonged.
What other medicines interact with Trimipramine?
MediHelp also lists interactions of Trimipramine with, for example, Disopyramide, Dofetilide, Ibutilide. The full list is on the Trimipramine page.
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