Drug interactions
Warfarin + Zanubrutinib
Severity: Major
Warfarin and Zanubrutinib: major 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 is associated with bleeding, so combining it with warfarin raises the risk of hemorrhage. Patients on full anticoagulation were often excluded from trials, so data are limited. Thrombocytopenia from zanubrutinib may increase the risk further.
What this interaction means in plain words
Warfarin and Zanubrutinib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Warfarin belongs to Cardiovascular; Zanubrutinib belongs to Oncology.
Why it happens
Additive bleeding risk from BTK-inhibitor-related platelet dysfunction and warfarin anticoagulation.
What to do
Monitor for bleeding, INR and platelet counts regularly. Consider an alternative to one agent in patients at high bleeding risk, and hold zanubrutinib around surgery as recommended.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Warfarin
- Defibrotide + Warfarin Contraindicated
- Ketorolac + Warfarin Contraindicated
- Abciximab + Warfarin Major
- Acetylsalicylic acid + Warfarin Major
- Adagrasib + Warfarin Major
- Amiodarone + Warfarin Major
Other interactions of Zanubrutinib
Frequently asked questions
Can I take Warfarin with Zanubrutinib?
MediHelp rates the interaction as major. Warfarin and Zanubrutinib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Zanubrutinib impairs platelet function and is associated with bleeding, so combining it with warfarin raises the risk of hemorrhage. Patients on full anticoagulation were often excluded from trials, so data are limited. Thrombocytopenia from zanubrutinib may increase the risk further.
How serious is the interaction between Warfarin and Zanubrutinib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for bleeding, INR and platelet counts regularly. Consider an alternative to one agent in patients at high bleeding risk, and hold zanubrutinib around surgery as recommended.
What other medicines interact with Warfarin?
MediHelp also lists interactions of Warfarin with, for example, Defibrotide, Ketorolac, Abciximab. The full list is on the Warfarin page.
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