Drug interactions
Methadone + Tropisetron
Severity: Moderate
Methadone 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
Both agents can prolong the QTc interval. Together they may increase the risk of torsades de pointes, particularly with high methadone doses or electrolyte disturbances.
What this interaction means in plain words
Methadone 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 QT prolongation via cardiac potassium channel blockade.
What to do
Obtain an ECG if risk factors exist and correct potassium and magnesium. Prefer a non-QT-prolonging antiemetic in high-risk patients.
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 Methadone
- Alvimopan + Methadone Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Methadone Contraindicated
- Droperidol + Methadone Contraindicated
- Ibutilide + Methadone Contraindicated
- Isocarboxazid + Methadone Contraindicated
- Lefamulin + Methadone Contraindicated
Frequently asked questions
Can I take Methadone with Tropisetron?
MediHelp rates the interaction as moderate. Methadone 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. Both agents can prolong the QTc interval. Together they may increase the risk of torsades de pointes, particularly with high methadone doses or electrolyte disturbances.
How serious is the interaction between Methadone 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: Obtain an ECG if risk factors exist and correct potassium and magnesium. Prefer a non-QT-prolonging antiemetic in high-risk patients.
What other medicines interact with Methadone?
MediHelp also lists interactions of Methadone with, for example, Alvimopan, Calcium / magnesium / potassium / sodium oxybates, Droperidol. The full list is on the Methadone page.
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