Apixaban and Heparin Interaction
Drug interaction information between Apixaban and Heparin.
Apixaban and Heparin have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Apixaban and Heparin. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Both drugs are blood thinners that prevent your blood from clotting. Using them together can make your blood too thin and increase your risk of serious bleeding.
What To Do
Use this combination only if specifically directed by a doctor, and watch closely for any signs of bleeding.
FDA Label Information
7.3 Anticoagulants and Antiplatelet Agents Coadministration of antiplatelet agents, fibrinolytics, heparin, aspirin, and chronic NSAID use increases the risk of bleeding.
Apixaban Also Interacts With
- Clopidogrel moderate
- Aspirin moderate
- Warfarin moderate
- Carbamazepine moderate
- Rifampin moderate
Heparin Also Interacts With
- Ibuprofen moderate
- Celecoxib moderate
- Hydroxychloroquine moderate
- Indomethacin moderate
- Dipyridamole moderate
Frequently Asked Questions
Can I take Apixaban and Heparin together?
This is a moderate interaction. Use this combination only if specifically directed by a doctor, and watch closely for any signs of bleeding.
How serious is the interaction between Apixaban and Heparin?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Apixaban and Heparin interact?
Both drugs are blood thinners that prevent your blood from clotting. Using them together can make your blood too thin and increase your risk of serious bleeding.
Understanding the Apixaban and Heparin Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Apixaban belongs to the Direct Oral Anticoagulant (Factor Xa Inhibitor) class and Heparin belongs to the Unfractionated Heparin class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Both drugs are blood thinners that prevent your blood from clotting. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Apixaban has 12 total documented interactions on file in this dataset, and Heparin has 20. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Use this combination only if specifically directed by a doctor, and watch closely for any signs of bleeding. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Apixaban or Heparin based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.