Drug interactions
Dabigatran + Heparin
Severity: Major
Dabigatran and Heparin: 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
Both agents are anticoagulants, so using them together substantially raises the risk of serious bleeding. Dabigatran labeling advises against parenteral anticoagulants being given at the same time except when switching therapy or maintaining catheter patency.
What this interaction means in plain words
Dabigatran and Heparin 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: heparin enhances antithrombin inhibition of thrombin and factor Xa while dabigatran directly inhibits thrombin.
What to do
Avoid concurrent use apart from planned transitions. When switching, start dabigatran at the time unfractionated heparin infusion is stopped, 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 Heparin
- Defibrotide + Heparin Contraindicated
- Heparin + Ketorolac Contraindicated
- Heparin + Oritavancin Contraindicated
- Acemetacin + Heparin Major
- Acetylsalicylic acid + Heparin Major
- Alteplase + Heparin Major
Frequently asked questions
Can I take Dabigatran with Heparin?
MediHelp rates the interaction as major. Dabigatran and Heparin 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. Both agents are anticoagulants, so using them together substantially raises the risk of serious bleeding. Dabigatran labeling advises against parenteral anticoagulants being given at the same time except when switching therapy or maintaining catheter patency.
How serious is the interaction between Dabigatran and Heparin?
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 apart from planned transitions. When switching, start dabigatran at the time unfractionated heparin infusion is stopped, and monitor for bleeding.
What other medicines interact with Heparin?
MediHelp also lists interactions of Heparin with, for example, Defibrotide, Ketorolac, Oritavancin. The full list is on the Heparin page.
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