Drug interactions
Gemtuzumab + Granisetron
Severity: Moderate
Gemtuzumab 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
Gemtuzumab ozogamicin has been associated with QT prolongation, and granisetron is commonly given as an antiemetic alongside it. The combined effect may increase the risk of torsade de pointes in susceptible patients.
What this interaction means in plain words
Gemtuzumab 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.
Why it happens
Additive QT interval prolongation.
What to do
Obtain a baseline ECG and monitor electrolytes, correcting potassium and magnesium. Consider an antiemetic with less QT effect in patients with long QT or other risk factors.
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
Frequently asked questions
Can I take Gemtuzumab with Granisetron?
MediHelp rates the interaction as moderate. Gemtuzumab 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. Gemtuzumab ozogamicin has been associated with QT prolongation, and granisetron is commonly given as an antiemetic alongside it. The combined effect may increase the risk of torsade de pointes in susceptible patients.
How serious is the interaction between Gemtuzumab 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: Obtain a baseline ECG and monitor electrolytes, correcting potassium and magnesium. Consider an antiemetic with less QT effect in patients with long QT or other risk factors.
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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