Drug interactions
Ondansetron + Sorafenib
Severity: Moderate
Ondansetron and Sorafenib: 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
Both agents can prolong the QT interval, so used together they may increase the risk of torsades de pointes. Patients with electrolyte disturbances or cardiac disease are at higher risk.
What this interaction means in plain words
Ondansetron and Sorafenib 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.
Ondansetron belongs to Gastrointestinal Tract; Sorafenib belongs to Oncology.
Why it happens
Additive QTc prolongation through effects on cardiac repolarization.
What to do
Check a baseline ECG and electrolytes, correct abnormalities, and monitor the QTc periodically during co-therapy.
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 Ondansetron
- Apomorphine + Ondansetron Contraindicated
- Ondansetron + Thioridazine Contraindicated
- Ondansetron + Vandetanib Contraindicated
- Adagrasib + Ondansetron Major
- Amiodarone + Ondansetron Major
- Amisulpride + Ondansetron Major
Other interactions of Sorafenib
Frequently asked questions
Can I take Ondansetron with Sorafenib?
MediHelp rates the interaction as moderate. Ondansetron and Sorafenib 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. Both agents can prolong the QT interval, so used together they may increase the risk of torsades de pointes. Patients with electrolyte disturbances or cardiac disease are at higher risk.
How serious is the interaction between Ondansetron and Sorafenib?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check a baseline ECG and electrolytes, correct abnormalities, and monitor the QTc periodically during co-therapy.
What other medicines interact with Ondansetron?
MediHelp also lists interactions of Ondansetron with, for example, Apomorphine, Thioridazine, Vandetanib. The full list is on the Ondansetron page.
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