Drug interactions
Arformoterol + Quinidine
Severity: Moderate
Arformoterol and Quinidine: 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
Quinidine prolongs the QT interval, and long-acting beta-agonists like arformoterol can cause hypokalemia and QT prolongation. The combination may increase arrhythmia risk.
What this interaction means in plain words
Arformoterol and Quinidine 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; Quinidine belongs to Anti Parasitic.
Why it happens
Additive QT prolongation, with beta-agonist-induced hypokalemia adding to proarrhythmic risk.
What to do
Monitor ECG and serum potassium, particularly at the start of therapy or with dose increases. Correct electrolyte abnormalities.
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 Quinidine
- Adagrasib + Quinidine Contraindicated
- Arsenic trioxide + Quinidine Contraindicated
- Artemether / lumefantrine + Quinidine Contraindicated
- Chloroquine + Quinidine Contraindicated
- Dofetilide + Quinidine Contraindicated
- Dronedarone + Quinidine Contraindicated
Other interactions of Arformoterol
Frequently asked questions
Can I take Arformoterol with Quinidine?
MediHelp rates the interaction as moderate. Arformoterol and Quinidine 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. Quinidine prolongs the QT interval, and long-acting beta-agonists like arformoterol can cause hypokalemia and QT prolongation. The combination may increase arrhythmia risk.
How serious is the interaction between Arformoterol and Quinidine?
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, particularly at the start of therapy or with dose increases. Correct electrolyte abnormalities.
What other medicines interact with Quinidine?
MediHelp also lists interactions of Quinidine with, for example, Adagrasib, Arsenic trioxide, Artemether / lumefantrine. The full list is on the Quinidine page.
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