Drug interactions
Flecainide + Formoterol-mometasone
Severity: Moderate
Flecainide and Formoterol-mometasone: 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
Flecainide slows cardiac conduction and can be proarrhythmic, while formoterol can lengthen QT and lower potassium. Hypokalemia may increase flecainide proarrhythmic risk.
What this interaction means in plain words
Flecainide and Formoterol-mometasone 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.
Flecainide belongs to Cardiovascular; Formoterol-mometasone belongs to Respiratory.
Why it happens
Additive effects on cardiac conduction and repolarization, with beta2-agonist-induced hypokalemia increasing proarrhythmic potential.
What to do
Monitor ECG and keep potassium and magnesium in the normal range. Watch for palpitations or syncope.
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-mometasone
Other interactions of Flecainide
- Flecainide + Nirmatrelvir Contraindicated
- Flecainide + Nirmatrelvir / ritonavir Contraindicated
- Flecainide + Pimozide Contraindicated
- Flecainide + Ritonavir Contraindicated
- Flecainide + Thioridazine Contraindicated
- Flecainide + Tipranavir Contraindicated
Frequently asked questions
Can I take Flecainide with Formoterol-mometasone?
MediHelp rates the interaction as moderate. Flecainide and Formoterol-mometasone 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. Flecainide slows cardiac conduction and can be proarrhythmic, while formoterol can lengthen QT and lower potassium. Hypokalemia may increase flecainide proarrhythmic risk.
How serious is the interaction between Flecainide and Formoterol-mometasone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor ECG and keep potassium and magnesium in the normal range. Watch for palpitations or syncope.
What other medicines interact with Formoterol-mometasone?
MediHelp also lists interactions of Formoterol-mometasone with, for example, Amiodarone, Amisulpride, Amoxapine. The full list is on the Formoterol-mometasone page.
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