Drug interactions
Azithromycin + Formoterol-mometasone
Severity: Moderate
Azithromycin 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
Azithromycin and formoterol can each prolong the QTc interval, so combined use may increase the risk of torsades de pointes in susceptible patients. The effect is usually small with inhaled formoterol.
What this interaction means in plain words
Azithromycin 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.
Azithromycin belongs to Anti Bacterial; Formoterol-mometasone belongs to Respiratory.
Why it happens
Additive prolongation of cardiac repolarization, with beta-agonist-related hypokalemia as a possible contributor.
What to do
Check and correct potassium and magnesium, and consider an ECG in patients with other QT risk factors or heart disease. Keep formoterol within recommended doses.
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 Azithromycin
- Azithromycin + Cisapride Contraindicated
- Azithromycin + Domperidone Contraindicated
- Azithromycin + Dronedarone Contraindicated
- Azithromycin + Pimozide Contraindicated
- Azithromycin + Piperaquine Contraindicated
- Azithromycin + Thioridazine Contraindicated
Frequently asked questions
Can I take Azithromycin with Formoterol-mometasone?
MediHelp rates the interaction as moderate. Azithromycin 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. Azithromycin and formoterol can each prolong the QTc interval, so combined use may increase the risk of torsades de pointes in susceptible patients. The effect is usually small with inhaled formoterol.
How serious is the interaction between Azithromycin 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: Check and correct potassium and magnesium, and consider an ECG in patients with other QT risk factors or heart disease. Keep formoterol within recommended doses.
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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