Bufexamac and Apixaban: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Aug 8, 2026 · Source data updated Jul 11, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Apixaban
Bufexamac
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Apixaban (Eliquis) is a blood thinner that helps prevent dangerous clots. Bufexamac is an anti-inflammatory medicine (an NSAID). When you use both, they can each work against your body's ability to stop bleeding. Put together, that means a higher chance of bleeding, and sometimes that bleeding can be serious.
This concern is based on how these types of drugs work rather than on strong studies, but it's worth taking seriously. Watch for things like unusual bruising, bleeding that won't stop, pink or red urine, or black stools. Please don't stop or change either medicine on your own. Your care team can manage this safely by keeping an eye on you and adjusting things if needed.
Effect: Additive increase in bleeding risk when apixaban (a direct factor Xa inhibitor) is combined with bufexamac (an NSAID). Neither is a prodrug in a way that changes direction here; the interaction is pharmacodynamic (additive impairment of hemostasis), not a CYP or transporter effect.
- Direction: Increased bleeding risk versus either agent alone.
- Mechanism: Additive effect on hemostasis; NSAIDs also add antiplatelet and GI mucosal injury effects.
- Evidence: Theoretical; severity rated major.
- Onset: Unspecified.
- Management: Monitor for bleeding. Heightened concern for epidural/spinal hematoma with neuraxial anesthesia or spinal puncture. Consider gastroprotection and reassess NSAID necessity.
What happens
An increased risk of bleeding
Interaction Deep Dive
Taking an anticoagulant together with an NSAID can raise the likelihood of serious bleeding compared with either agent used on its own1234, and in patients undergoing neuraxial anesthesia or spinal puncture it can heighten the risk of epidural or spinal hematomas, which may lead to prolonged or permanent paralysis5. When the two are given at the same time, watch for indications of bleeding124.
Why it happens (mechanism)
Additive effect on hemostasis
How to manage this interaction
The main step here is careful monitoring for bleeding if both are used together. Your care team can manage this safely.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise.
- Watch for warning signs: unusual bruising, nosebleeds, bleeding gums, pink/red urine, black or bloody stools, or bleeding that won't stop.
- Tell your team you take these two together, especially before any spinal procedure or epidural, because of a rare but serious risk of a spinal blood collection.
- Ask your pharmacist whether a safer pain option or a stomach-protecting medicine makes sense for you.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Bufexamac and Apixaban together?
Using the blood thinner apixaban with the NSAID bufexamac can add up to a higher bleeding risk, so watch closely for any signs of bleeding and check with your pharmacist or doctor before making changes. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Bufexamac and Apixaban interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Bufexamac and Apixaban interaction managed?
The main step here is careful monitoring for bleeding if both are used together. Your care team can manage this safely. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Watch for warning signs: unusual bruising, nosebleeds, bleeding gums, pink/red urine, black or bloody stools, or bleeding that won't stop. Tell your team you take these two together, especially bef… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Bufexamac or Apixaban need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (5)
- Product Information: CALDOLOR(R) intravenous injection, ibuprofen intravenous injection. Cumberland Pharmaceuticals Inc. (per FDA), Nashville, TN, 2016. DailyMed
- Product Information: CELEBREX(R) oral capsules, celecoxib oral capsules. GD Searle LLC (per FDA), New York, NY, 2016. DailyMed
- Product Information: COUMADIN(R) oral tablets, intravenous injection powder for solution, warfarin sodium oral tablets, intravenous injection powder for solution. Bristol-Myers Squibb Company (per manufacturer), Princeton, NJ, 2015. DailyMed
- Product Information: COMBOGESIC(R) oral tablets, acetaminophen ibuprofen oral tablets. AFT Pharmaceuticals Inc (per FDA), Highland, MD, 2023. DailyMed
- Product Information: PRADAXA(R) oral capsules, dabigatran etexilate oral capsules. Boehringer Ingelheim Pharmaceuticals Inc (per FDA), Ridgefield, CT, 2023. DailyMed
Keep reading about Apixaban
Keep reading about Bufexamac
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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