Drug interactions
Defibrotide + Warfarin
Severity: Contraindicated
Defibrotide and Warfarin: contraindicated 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
Defibrotide enhances fibrinolysis and may add to the bleeding risk of warfarin. Its labeling contraindicates concomitant systemic anticoagulants. Serious hemorrhage may result.
What this interaction means in plain words
Defibrotide and Warfarin are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Defibrotide belongs to Cardiovascular; Warfarin belongs to Cardiovascular.
Why it happens
Additive pharmacodynamic effects on hemostasis from vitamin K antagonism and defibrotide's profibrinolytic activity.
What to do
Do not co-administer; hold warfarin during defibrotide treatment. Check INR and reassess bleeding risk before restarting warfarin.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Warfarin
- Ketorolac + Warfarin Contraindicated
- Abciximab + Warfarin Major
- Acetylsalicylic acid + Warfarin Major
- Adagrasib + Warfarin Major
- Amiodarone + Warfarin Major
- Amobarbital + Warfarin Major
Other interactions of Defibrotide
- Alteplase + Defibrotide Contraindicated
- Apixaban + Defibrotide Contraindicated
- Argatroban + Defibrotide Contraindicated
- Dabigatran etexilate + Defibrotide Contraindicated
- Dalteparin + Defibrotide Contraindicated
- Defibrotide + Edoxaban Contraindicated
Frequently asked questions
Can I take Defibrotide with Warfarin?
MediHelp rates the interaction as contraindicated. Defibrotide and Warfarin are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Defibrotide enhances fibrinolysis and may add to the bleeding risk of warfarin. Its labeling contraindicates concomitant systemic anticoagulants. Serious hemorrhage may result.
How serious is the interaction between Defibrotide and Warfarin?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not co-administer; hold warfarin during defibrotide treatment. Check INR and reassess bleeding risk before restarting warfarin.
What other medicines interact with Warfarin?
MediHelp also lists interactions of Warfarin with, for example, Ketorolac, Abciximab, Acetylsalicylic acid. The full list is on the Warfarin page.
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