Drug interactions
Granisetron + Selpercatinib
Severity: Moderate
Granisetron and Selpercatinib: 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
Selpercatinib can prolong the QT interval and granisetron may add to this effect. The risk increases with electrolyte disturbances and other QT-prolonging drugs.
What this interaction means in plain words
Granisetron and Selpercatinib 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 belongs to Gastrointestinal Tract; Selpercatinib belongs to Oncology.
Why it happens
Additive prolongation of the QT interval.
What to do
Monitor the ECG and keep potassium and magnesium within normal range. Consider an alternative antiemetic if the QTc rises.
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 Selpercatinib
Frequently asked questions
Can I take Granisetron with Selpercatinib?
MediHelp rates the interaction as moderate. Granisetron and Selpercatinib 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. Selpercatinib can prolong the QT interval and granisetron may add to this effect. The risk increases with electrolyte disturbances and other QT-prolonging drugs.
How serious is the interaction between Granisetron and Selpercatinib?
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 the ECG and keep potassium and magnesium within normal range. Consider an alternative antiemetic if the QTc rises.
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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