Fexinidazole 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
Fexinidazole
No brand names on recordApixaban
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.
Here's what's going on. Fexinidazole can slow down a liver enzyme called CYP3A4, which is one of the ways your body clears apixaban (Eliquis), a blood thinner. If apixaban isn't broken down as fast, more of it can build up in your blood.
With a blood thinner, more drug means a higher chance of bleeding, like easy bruising, nosebleeds, or bleeding that's slow to stop. The good news is this is something your care team can plan for. If you're prescribed both, talk with your doctor or pharmacist before starting. Don't stop either medicine on your own, and let your team know right away if you notice unusual bleeding.
Mechanism: Fexinidazole inhibits CYP3A4-mediated metabolism. Apixaban is a CYP3A4 (and P-gp) substrate, so co-administration is expected to increase apixaban exposure (AUC/Cmax), raising bleeding risk.
- Direction: Increased apixaban effect (neither drug is a prodrug here).
- Severity: Major.
- Onset: Unspecified.
- Evidence: Theoretical.
- Management: Manufacturer guidance is to avoid concomitant use. If unavoidable, dose may need to be individualized and patients monitored closely for signs of bleeding. Coordinate any changes with the prescriber.
What happens
An increased CYP3A4 substrate exposure
Interaction Deep Dive
Because fexinidazole acts as a CYP3A4 inhibitor, taking it together with CYP3A4 substrates can raise the concentrations of those substrate drugs, which heightens the likelihood of adverse reactions; for this reason, such combined use should be avoided1.
Why it happens (mechanism)
Inhibition of CYP3A4-mediated metabolism by fexinidazole
How to manage this interaction
What your care team may do:
- The documented guidance is to avoid using these two together when possible, because higher apixaban levels raise bleeding risk.
- If both are truly needed, your team may adjust and individualize your plan and watch you more closely for bleeding.
What you should do:
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise.
- Ask your pharmacist or doctor before starting fexinidazole while on apixaban.
- Report unusual bruising, nosebleeds, blood in urine or stool, or bleeding that won't stop.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Fexinidazole and Apixaban together?
Fexinidazole can raise apixaban levels and increase bleeding risk, so this combination should generally be avoided; check with your doctor or pharmacist before using both. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Fexinidazole 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 Fexinidazole and Apixaban interaction managed?
What your care team may do: The documented guidance is to avoid using these two together when possible, because higher apixaban levels raise bleeding risk. If both are truly needed, your team may adjust and individualize your plan and watch you more closely for bleeding. What you should do: Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Ask your pharmacist or do… 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 Fexinidazole 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 (1)
- Product Information: Fexinidazole oral tablets, fexinidazole oral tablets. sanofi-aventis US LLC (per FDA), Bridgewater, NJ, 2021. DailyMed
Keep reading about Fexinidazole
Keep reading about Apixaban
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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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