Drug interactions
Paroxetine + Zanubrutinib
Severity: Moderate
Paroxetine 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 increases bleeding risk through BTK inhibition of platelet function and cytopenias. SSRIs such as paroxetine impair platelet serotonin uptake and also raise bleeding risk, particularly gastrointestinal bleeding, so the effects may be additive.
What this interaction means in plain words
Paroxetine 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.
Paroxetine belongs to Central Nervous System; Zanubrutinib belongs to Oncology.
Why it happens
Additive impairment of platelet function from BTK inhibition and SSRI-related platelet serotonin depletion.
What to do
Monitor for bruising, bleeding and blood counts, and consider gastroprotection in high-risk patients. Review the need for other antiplatelet or anticoagulant drugs.
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 Paroxetine
- Isocarboxazid + Paroxetine Contraindicated
- Methylene blue + Paroxetine Contraindicated
- Paroxetine + Phenelzine Contraindicated
- Paroxetine + Pimozide Contraindicated
- Paroxetine + Procarbazine Contraindicated
- Paroxetine + Selegiline Contraindicated
Other interactions of Zanubrutinib
Frequently asked questions
Can I take Paroxetine with Zanubrutinib?
MediHelp rates the interaction as moderate. Paroxetine 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 increases bleeding risk through BTK inhibition of platelet function and cytopenias. SSRIs such as paroxetine impair platelet serotonin uptake and also raise bleeding risk, particularly gastrointestinal bleeding, so the effects may be additive.
How serious is the interaction between Paroxetine 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 bruising, bleeding and blood counts, and consider gastroprotection in high-risk patients. Review the need for other antiplatelet or anticoagulant drugs.
What other medicines interact with Paroxetine?
MediHelp also lists interactions of Paroxetine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Paroxetine page.
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