Inotersen 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
Inotersen
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.
Taking Eliquis (apixaban) with inotersen can raise your risk of bleeding. Apixaban is a blood thinner that keeps clots from forming. Inotersen can sometimes cause a sudden, hard-to-predict drop in your platelets, the tiny cells that help your blood clot. When platelets fall and you are also on a blood thinner, bleeding can become more likely and, rarely, serious.
Please don't stop either medicine on your own. This is something your care team knows how to handle. They can check your platelet counts and watch for any signs of bleeding, like unusual bruising, nosebleeds, or blood in your urine or stool. Report anything like that right away.
Effect: Increased bleeding risk with concurrent apixaban (a direct factor Xa inhibitor) and inotersen.
Mechanism: Additive hemostatic impairment. Apixaban provides anticoagulation; inotersen can cause sudden, unpredictable, potentially severe thrombocytopenia. Neither is a prodrug; the interaction is pharmacodynamic, not PK-based.
Evidence/onset: Theoretical basis, major severity, onset unspecified.
Management:
- Use concurrently with caution; avoid adding OTC antiplatelet agents (aspirin, NSAIDs) unless directed.
- Monitor platelet counts per inotersen protocol and watch for bleeding.
- Consider discontinuing anticoagulant therapy if platelet count falls below 50 x 10(9)/L.
What happens
Increased risk of bleeding
Interaction Deep Dive
Inotersen lowers platelet counts and can trigger abrupt, unforeseeable thrombocytopenia with potentially life-threatening consequences. Because of this, giving inotersen together with an antiplatelet or anticoagulant agent, including over-the-counter products that influence platelets (aspirin, NSAIDs) or anticoagulants, heightens bleeding risk and warrants caution. In patients on inotersen whose platelet count drops below 50 x 10(9)/L, discontinuation of antiplatelet or anticoagulant therapy should be considered1.
Why it happens (mechanism)
Additive antiplatelet and anticoagulation
How to manage this interaction
Keep taking both medicines as prescribed unless your care team tells you otherwise. This combination can be used together with caution and monitoring.
- Your team will likely check your platelet counts regularly while you are on inotersen.
- If your platelet count drops very low, your team may adjust or pause your blood thinner. That decision is theirs to individualize.
- Avoid starting non-prescription products that affect bleeding, such as aspirin or NSAIDs (ibuprofen, naproxen), without checking first.
- Tell your pharmacist or doctor right away about unusual bruising, nosebleeds, bleeding gums, or blood in urine or stool.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Inotersen and Apixaban together?
Combining Eliquis (apixaban) with inotersen raises bleeding risk because inotersen can suddenly lower platelets while apixaban thins the blood; keep taking both as prescribed, avoid OTC aspirin or NSAIDs unless approved, and let your care team monitor your platelets and watch for bleeding. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Inotersen 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 Inotersen and Apixaban interaction managed?
Keep taking both medicines as prescribed unless your care team tells you otherwise. This combination can be used together with caution and monitoring. Your team will likely check your platelet counts regularly while you are on inotersen. If your platelet count drops very low, your team may adjust or pause your blood thinner. That decision is theirs to individualize. Avoid starting non-prescription… 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 Inotersen 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: TEGSEDI(TM) subcutaneous injection, inotersen subcutaneous injection. Ionis Pharmaceuticals, Inc (per FDA), Carlsbad, CA, 2018. DailyMed
Keep reading about Apixaban
Keep reading about Inotersen
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