Drug interactions
Dabigatran + Fondaparinux
Severity: Major
Dabigatran and Fondaparinux: 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
Two anticoagulants with different targets given together substantially raise the risk of major bleeding. Concurrent use is rarely justified outside brief transitions.
What this interaction means in plain words
Dabigatran and Fondaparinux 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 anticoagulation via indirect factor Xa inhibition and direct thrombin inhibition.
What to do
Avoid concurrent use. When transitioning, start dabigatran at the time the next fondaparinux dose is due, and 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 Fondaparinux
- Defibrotide + Fondaparinux Contraindicated
- Fondaparinux + Ketorolac Contraindicated
- Abciximab + Fondaparinux Major
- Aceclofenac + Fondaparinux Major
- Acetylsalicylic acid + Fondaparinux Major
- Alteplase + Fondaparinux Major
Frequently asked questions
Can I take Dabigatran with Fondaparinux?
MediHelp rates the interaction as major. Dabigatran and Fondaparinux 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. Two anticoagulants with different targets given together substantially raise the risk of major bleeding. Concurrent use is rarely justified outside brief transitions.
How serious is the interaction between Dabigatran and Fondaparinux?
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 concurrent use. When transitioning, start dabigatran at the time the next fondaparinux dose is due, and monitor for bleeding.
What other medicines interact with Fondaparinux?
MediHelp also lists interactions of Fondaparinux with, for example, Defibrotide, Ketorolac, Abciximab. The full list is on the Fondaparinux page.
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