Drug interactions
Formoterol + Tropisetron
Severity: Moderate
Formoterol 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 drugs can prolong the QT interval, so using them together may raise the risk of ventricular arrhythmia. The risk is higher with hypokalemia, structural heart disease or other QT-prolonging drugs.
What this interaction means in plain words
Formoterol 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, with formoterol-induced hypokalemia as a further contributor.
What to do
Correct potassium and magnesium before use and consider an ECG in patients with cardiac risk factors. Choose an alternative antiemetic if QTc is already 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 Formoterol
- Adagrasib + Formoterol Major
- Amiodarone + Formoterol Major
- Amisulpride + Formoterol Major
- Amitriptyline + Formoterol Major
- Amoxapine + Formoterol Major
- Arformoterol + Formoterol Major
Frequently asked questions
Can I take Formoterol with Tropisetron?
MediHelp rates the interaction as moderate. Formoterol 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 drugs can prolong the QT interval, so using them together may raise the risk of ventricular arrhythmia. The risk is higher with hypokalemia, structural heart disease or other QT-prolonging drugs.
How serious is the interaction between Formoterol 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 before use and consider an ECG in patients with cardiac risk factors. Choose an alternative antiemetic if QTc is already prolonged.
What other medicines interact with Formoterol?
MediHelp also lists interactions of Formoterol with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Formoterol page.
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