Drug interactions
Fluoxetine + Zanubrutinib
Severity: Moderate
Fluoxetine and Zanubrutinib: 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
Zanubrutinib impairs platelet function and can cause cytopenias, and SSRIs such as fluoxetine also impair platelet aggregation. Together bleeding risk is increased, including bruising and gastrointestinal bleeding.
What this interaction means in plain words
Fluoxetine and Zanubrutinib 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.
Fluoxetine belongs to Central Nervous System; Zanubrutinib belongs to Oncology.
Why it happens
Additive impairment of platelet function (BTK inhibition and SSRI depletion of platelet serotonin).
What to do
Monitor for bleeding and follow blood counts regularly. Review other antithrombotic drugs and consider gastric protection in patients at high risk.
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 Fluoxetine and Zanubrutinib, 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 7 days on the web. No card needed.
Other interactions of Fluoxetine
- Fluoxetine + Isocarboxazid Contraindicated
- Fluoxetine + Mavacamten Contraindicated
- Fluoxetine + Methylene blue Contraindicated
- Fluoxetine + Phenelzine Contraindicated
- Fluoxetine + Pimozide Contraindicated
- Fluoxetine + Rasagiline Contraindicated
Other interactions of Zanubrutinib
Frequently asked questions
Can I take Fluoxetine with Zanubrutinib?
MediHelp rates the interaction as moderate. Fluoxetine and Zanubrutinib 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. Zanubrutinib impairs platelet function and can cause cytopenias, and SSRIs such as fluoxetine also impair platelet aggregation. Together bleeding risk is increased, including bruising and gastrointestinal bleeding.
How serious is the interaction between Fluoxetine and Zanubrutinib?
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 for bleeding and follow blood counts regularly. Review other antithrombotic drugs and consider gastric protection in patients at high risk.
What other medicines interact with Fluoxetine?
MediHelp also lists interactions of Fluoxetine with, for example, Isocarboxazid, Mavacamten, Methylene blue. The full list is on the Fluoxetine 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.
