Drug interactions
Formoterol + Metaproterenol
Severity: Moderate
Formoterol and Metaproterenol: 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 are beta-agonists, so combined use adds to hypokalemia, tachycardia, tremor and blood pressure effects. This may precipitate arrhythmias in patients with cardiovascular disease.
What this interaction means in plain words
Formoterol and Metaproterenol 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 beta adrenergic stimulation.
What to do
Avoid regular concurrent use of two beta-agonists and monitor heart rate and potassium if both are necessary.
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 Metaproterenol?
MediHelp rates the interaction as moderate. Formoterol and Metaproterenol 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 are beta-agonists, so combined use adds to hypokalemia, tachycardia, tremor and blood pressure effects. This may precipitate arrhythmias in patients with cardiovascular disease.
How serious is the interaction between Formoterol and Metaproterenol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid regular concurrent use of two beta-agonists and monitor heart rate and potassium if both are necessary.
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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