Apixaban and Artemether: 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
Artemether
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. Artemether (part of a malaria medicine) may slightly speed up how your body clears apixaban (Eliquis), which is a blood thinner. In theory, that could leave a little less apixaban in your system than expected, and apixaban works to prevent dangerous blood clots.
I want to be clear that this concern is theoretical, meaning it's based on how these drugs might behave rather than strong studies in people. Malaria treatment is also usually short, just a few days. Please keep taking both exactly as prescribed and let your pharmacist or doctor know you take Eliquis so they can keep an eye on things.
Mechanism: Artemether/lumefantrine may induce CYP3A4, and apixaban is a CYP3A4 (and P-gp) substrate. Net effect would be increased apixaban clearance, reduced exposure (AUC/Cmax), and potentially reduced anticoagulant efficacy (higher thromboembolic risk).
- Direction: reduced apixaban effect (neither drug is a prodrug here).
- Evidence: theoretical only.
- Onset: unspecified; enzyme induction is typically gradual and antimalarial courses are short.
- Management: exercise caution; monitor for signs of thrombosis. Apixaban therapy may be individualized by the care team, with closer clinical monitoring during and shortly after antimalarial treatment.
What happens
Reduced CYP3A4 substrate exposure and reduced efficacy of CYP3A4 substrate
Interaction Deep Dive
Use care when combining artemether/lumefantrine with substrates of CYP3A4, since the combination can lower the exposure of these CYP3A4 substrates, potentially diminishing their effectiveness1.
Why it happens (mechanism)
Induction of CYP3A4-substrate metabolism by artemether/lumefantrine
How to manage this interaction
The good news: this is a theoretical interaction and malaria treatment courses are short, so your care team can manage it.
- Keep taking both exactly as prescribed unless your doctor or pharmacist tells you otherwise.
- Tell your prescriber and pharmacist that you take apixaban (Eliquis) before starting the antimalarial.
- Your team may monitor you more closely for any signs a clot is forming, such as leg swelling or pain, chest pain, or shortness of breath.
- Report new symptoms promptly during and just after the antimalarial course.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Apixaban and Artemether together?
Artemether may in theory speed up clearance of apixaban and slightly weaken its clot-preventing effect, but this is unproven and the antimalarial course is short. Keep taking both as prescribed and let your care team know so they can monitor you. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Apixaban and Artemether interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Apixaban and Artemether interaction managed?
The good news: this is a theoretical interaction and malaria treatment courses are short, so your care team can manage it. Keep taking both exactly as prescribed unless your doctor or pharmacist tells you otherwise. Tell your prescriber and pharmacist that you take apixaban (Eliquis) before starting the antimalarial. Your team may monitor you more closely for any signs a clot is forming, such as l… 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 Apixaban or Artemether 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 anything you'd monitor while I'm on both?
References (1)
- Product Information: COARTEM® oral tablets, artemether lumefantrine oral tablets. Novartis Pharmaceuticals Corporation (per DailyMed), East Hanover, NJ, 2025. DailyMed
Keep reading about Artemether
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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