Drug interactions
Arformoterol + Flecainide
Severity: Moderate
Arformoterol and Flecainide: 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
Arformoterol, a long-acting beta2 agonist, may cause hypokalemia, tachycardia and QT prolongation, which can add to the proarrhythmic risk of flecainide. Patients with heart disease are most vulnerable.
What this interaction means in plain words
Arformoterol and Flecainide 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.
Arformoterol belongs to Respiratory; Flecainide belongs to Cardiovascular.
Why it happens
Additive proarrhythmic effects via QT prolongation and beta2-mediated hypokalemia.
What to do
Monitor ECG and serum potassium and magnesium. Correct electrolyte disturbances and report 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 Flecainide
- Flecainide + Nirmatrelvir Contraindicated
- Flecainide + Nirmatrelvir / ritonavir Contraindicated
- Flecainide + Pimozide Contraindicated
- Flecainide + Ritonavir Contraindicated
- Flecainide + Thioridazine Contraindicated
- Flecainide + Tipranavir Contraindicated
Other interactions of Arformoterol
Frequently asked questions
Can I take Arformoterol with Flecainide?
MediHelp rates the interaction as moderate. Arformoterol and Flecainide 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. Arformoterol, a long-acting beta2 agonist, may cause hypokalemia, tachycardia and QT prolongation, which can add to the proarrhythmic risk of flecainide. Patients with heart disease are most vulnerable.
How serious is the interaction between Arformoterol and Flecainide?
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 serum potassium and magnesium. Correct electrolyte disturbances and report palpitations or syncope.
What other medicines interact with Flecainide?
MediHelp also lists interactions of Flecainide with, for example, Nirmatrelvir, Nirmatrelvir / ritonavir, Pimozide. The full list is on the Flecainide page.
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