Apixaban and Omega-3-Acid Ethyl Esters: 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
Omega-3-Acid Ethyl Esters
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.
You're taking Eliquis (apixaban), a blood thinner, along with Lovaza (omega-3-acid ethyl esters), a prescription fish oil. Both can make it a little harder for your blood to clot. Some studies suggest omega-3s may slightly lengthen the time it takes you to stop bleeding, so putting the two together could add up to a bit more bleeding risk.
I'll be honest: this is more of a theoretical concern, and the real-world effect isn't well proven. Just keep an eye out for things like easy bruising, nosebleeds, or bleeding gums, and let your care team know. They can watch this and keep you safe.
Effect: Potential additive bleeding risk when apixaban is combined with omega-3-acid ethyl esters.
- Mechanism: Additive/pharmacodynamic. Apixaban is a direct factor Xa inhibitor; omega-3 ethyl esters may prolong bleeding time. Neither is a prodrug, and no clinically significant PK (CYP/P-gp) interaction is implicated here.
- Direction/magnitude: Possible increase in bleeding tendency; magnitude undefined.
- Onset: Unspecified.
- Evidence: Theoretical; net clinical effect unknown.
- Management: Monitor periodically for bleeding (bruising, mucosal bleeding, hemoglobin if indicated). No routine dose change mandated; individualize per patient risk.
What happens
An increased risk of bleeding
Interaction Deep Dive
Certain research indicates that bleeding time can be extended by omega-3-acid ethyl esters. Because the impact of using omega-3-acid ethyl esters together with anticoagulants has not been established, periodic monitoring is advised1.
Why it happens (mechanism)
Additive anticoagulation
How to manage this interaction
The main step here is periodic monitoring, since the combined effect is not well established but both products can affect bleeding.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise.
- Watch for signs of bleeding: unusual bruising, nosebleeds, bleeding gums, pink or red urine, or dark stools.
- Tell your pharmacist or doctor that you take both, especially before any surgery or dental work.
- Your care team may check on you more closely and can individualize your plan if needed.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Apixaban and Omega-3-Acid Ethyl Esters together?
Combining Eliquis with prescription omega-3 (Lovaza) may slightly add to bleeding risk, though this is mostly theoretical. Keep taking both as prescribed and report any unusual bleeding or bruising to your care team. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Apixaban and Omega-3-Acid Ethyl Esters 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 Omega-3-Acid Ethyl Esters interaction managed?
The main step here is periodic monitoring, since the combined effect is not well established but both products can affect bleeding. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Watch for signs of bleeding: unusual bruising, nosebleeds, bleeding gums, pink or red urine, or dark stools. Tell your pharmacist or doctor that you take both, especially before any sur… 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 Omega-3-Acid Ethyl Esters 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: LOVAZA oral capsules, omega-3-acid ethyl esters oral capsules. Waylis Therapeutics LLC (per Dailymed), Rahway, NJ, 2024. DailyMed
Keep reading about Apixaban
Keep reading about Omega-3-Acid Ethyl Esters
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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