Drug interactions
Olanzapine + Selpercatinib
Severity: Moderate
Olanzapine 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 olanzapine may add modestly to this effect. The combination may raise the risk of torsades de pointes, particularly with electrolyte abnormalities or cardiac disease.
What this interaction means in plain words
Olanzapine 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.
Olanzapine belongs to Central Nervous System; Selpercatinib belongs to Oncology.
Why it happens
Additive QT interval prolongation.
What to do
Monitor ECG and electrolytes at baseline and periodically, and correct potassium and magnesium. Consider an alternative antipsychotic with lower QT risk if QTc becomes prolonged.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Olanzapine and Selpercatinib, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Olanzapine
Other interactions of Selpercatinib
Frequently asked questions
Can I take Olanzapine with Selpercatinib?
MediHelp rates the interaction as moderate. Olanzapine 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 olanzapine may add modestly to this effect. The combination may raise the risk of torsades de pointes, particularly with electrolyte abnormalities or cardiac disease.
How serious is the interaction between Olanzapine 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 ECG and electrolytes at baseline and periodically, and correct potassium and magnesium. Consider an alternative antipsychotic with lower QT risk if QTc becomes prolonged.
What other medicines interact with Olanzapine?
MediHelp also lists interactions of Olanzapine with, for example, Amisulpride, Amoxapine, Apomorphine. The full list is on the Olanzapine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
