Drug interactions
Dabigatran + Warfarin
Severity: Major
Dabigatran and Warfarin: 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
Combining two anticoagulants increases the risk of major bleeding. Warfarin also raises INR in a way that complicates assessment while dabigatran is on board.
What this interaction means in plain words
Dabigatran and Warfarin 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.
Why it happens
Additive pharmacodynamic anticoagulation through thrombin inhibition and vitamin K antagonism.
What to do
Avoid except during planned transitions, following labeled switching instructions based on INR. Monitor for bleeding.
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
Frequently asked questions
Can I take Dabigatran with Warfarin?
MediHelp rates the interaction as major. Dabigatran and Warfarin 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. Combining two anticoagulants increases the risk of major bleeding. Warfarin also raises INR in a way that complicates assessment while dabigatran is on board.
How serious is the interaction between Dabigatran and Warfarin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid except during planned transitions, following labeled switching instructions based on INR. Monitor for bleeding.
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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