Drug interactions
Arformoterol + Granisetron
Severity: Moderate
Arformoterol and Granisetron: 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
Granisetron can mildly prolong the QT interval, and arformoterol, a long-acting beta-2 agonist, may prolong QTc and lower serum potassium. Together they may modestly raise the risk of ventricular arrhythmias, especially in patients with cardiac disease or electrolyte disturbances.
What this interaction means in plain words
Arformoterol and Granisetron 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; Granisetron belongs to Gastrointestinal Tract.
Why it happens
Additive QT prolongation, with beta-agonist-mediated hypokalemia and increased heart rate contributing to proarrhythmic risk.
What to do
Correct potassium and magnesium before starting and monitor ECG in patients with heart disease or other QT-prolonging drugs. Report palpitations or syncope promptly.
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 Granisetron
- Apomorphine + Granisetron Contraindicated
- Amiodarone + Granisetron Major
- Amisulpride + Granisetron Major
- Arsenic trioxide + Granisetron Major
- Artemether / lumefantrine + Granisetron Major
- Artemether + Granisetron Major
Other interactions of Arformoterol
Frequently asked questions
Can I take Arformoterol with Granisetron?
MediHelp rates the interaction as moderate. Arformoterol and Granisetron 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. Granisetron can mildly prolong the QT interval, and arformoterol, a long-acting beta-2 agonist, may prolong QTc and lower serum potassium. Together they may modestly raise the risk of ventricular arrhythmias, especially in patients with cardiac disease or electrolyte disturbances.
How serious is the interaction between Arformoterol and Granisetron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Correct potassium and magnesium before starting and monitor ECG in patients with heart disease or other QT-prolonging drugs. Report palpitations or syncope promptly.
What other medicines interact with Granisetron?
MediHelp also lists interactions of Granisetron with, for example, Apomorphine, Amiodarone, Amisulpride. The full list is on the Granisetron page.
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