Drug interactions
Arformoterol + Posaconazole
Severity: Moderate
Arformoterol and Posaconazole: 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 can cause hypokalemia and QT prolongation, and posaconazole independently prolongs QT. The combination may raise the risk of ventricular arrhythmia in susceptible patients.
What this interaction means in plain words
Arformoterol and Posaconazole 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; Posaconazole belongs to Anti Fungals.
Why it happens
Additive QT prolongation, with beta-agonist-induced hypokalemia.
What to do
Monitor ECG and serum potassium and magnesium, and correct deficits, especially in patients with heart disease.
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 Posaconazole
- Artemether + Posaconazole Contraindicated
- Avanafil + Posaconazole Contraindicated
- Cobimetinib + Posaconazole Contraindicated
- Conivaptan + Posaconazole Contraindicated
- Dihydroergotamine intranasal + Posaconazole Contraindicated
- Dihydroergotamine + Posaconazole Contraindicated
Other interactions of Arformoterol
Frequently asked questions
Can I take Arformoterol with Posaconazole?
MediHelp rates the interaction as moderate. Arformoterol and Posaconazole 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 can cause hypokalemia and QT prolongation, and posaconazole independently prolongs QT. The combination may raise the risk of ventricular arrhythmia in susceptible patients.
How serious is the interaction between Arformoterol and Posaconazole?
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, and correct deficits, especially in patients with heart disease.
What other medicines interact with Posaconazole?
MediHelp also lists interactions of Posaconazole with, for example, Artemether, Avanafil, Cobimetinib. The full list is on the Posaconazole page.
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