Ondansetron and Ribociclib: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Ondansetron and Ribociclib unless specifically directed by your doctor.
How Ondansetron interacts with Ribociclib
Both drugs inhibit cardiac repolarization and prolong the QT interval, creating an additive risk of torsades de pointes and sudden cardiac death.
What you should do
Avoid concurrent use when possible and choose a non-QT-prolonging antiemetic. If unavoidable, correct electrolytes and perform baseline and follow-up ECG monitoring.
Key facts
Severity
Major — avoid combination
Mechanism
Both drugs inhibit cardiac repolarization and prolong the QT interval, creating an additive risk of torsades de pointes ...
Action
Avoid concurrent use when possible and choose a non-QT-prolonging antiemetic. If unavoidable, correct electrolytes and p...
Frequently asked questions
Can I take Ondansetron and Ribociclib together?
No — this combination should generally be avoided. Avoid concurrent use when possible and choose a non-QT-prolonging antiemetic. If unavoidable, correct electrolytes and perform baseline and follow-up ECG monitoring.
What is the severity of this interaction?
The interaction between Ondansetron and Ribociclib is classified as Major — avoid combination. Both drugs inhibit cardiac repolarization and prolong the QT interval, creating an additive risk of torsades de pointes and sudden cardiac death.
What should I do if I'm prescribed both?
Avoid concurrent use when possible and choose a non-QT-prolonging antiemetic. If unavoidable, correct electrolytes and perform baseline and follow-up ECG monitoring. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.