Telaprevir 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
Telaprevir
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.
Taking these two together can raise your bleeding risk. Apixaban (Eliquis) is a blood thinner. Telaprevir slows down two body systems (an enzyme called CYP3A4 and a transporter called P-gp) that normally help clear apixaban out of your body. When those are slowed, more apixaban stays in your blood, so it can work too strongly and make bleeding more likely.
Watch for warning signs like unusual bruising, nosebleeds, pink or red urine, black stools, or bleeding that won't stop. Please don't change either medicine on your own. Your doctor or pharmacist can manage this by adjusting your apixaban dose or watching you more closely.
Effect: Increased apixaban exposure and elevated bleeding risk. Neither drug is a prodrug; apixaban is a substrate of both CYP3A4 and P-gp.
Mechanism: Telaprevir inhibits CYP3A4-mediated metabolism and P-gp-mediated efflux of apixaban, increasing systemic exposure. As a reference, ketoconazole (combined P-gp/strong CYP3A4 inhibitor) raised apixaban Cmax 62% and AUC 97%.
- Severity: Major; evidence probable.
- Management: Avoid concomitant use when apixaban is dosed at 2.5 mg PO BID. For 5 or 10 mg BID regimens, reduce dose by 50%.
- Monitor: Signs and symptoms of bleeding.
What happens
Increased apixaban exposure and an increased risk of bleeding
Interaction Deep Dive
In patients taking apixaban at a dose of 2.5 mg by mouth twice daily, do not use these agents together. When apixaban is prescribed at higher doses (that is, 5 or 10 mg twice daily), reduce the dose by 50% if a combined P-gp and strong CYP3A4 inhibitor is given concurrently. Apixaban is a substrate of both CYP3A4 and P-gp, so combining it with an inhibitor that acts on both P-gp and CYP3A4 (strong) can raise apixaban exposure and heighten bleeding risk12. A pharmacokinetic study showed that apixaban Cmax rose by 62% and AUC by 97% when it was given together with ketoconazole, a combined P-gp and strong CYP3A4 inhibitor3.
Why it happens (mechanism)
Inhibition of CYP3A4-mediated metabolism; inhibition of P-gp-mediated efflux transport of apixaban
How to manage this interaction
This combination can be managed by your care team. Based on the documented guidance:
- If you take apixaban 2.5 mg twice daily, this combination is generally avoided.
- If you take 5 mg or 10 mg twice daily, your team may reduce your apixaban dose by half while you are on telaprevir.
- Any dose change should be made by your prescriber and individualized to you.
What you should do: Keep taking both medicines as prescribed, and contact your pharmacist or doctor before starting or stopping either one. Report any unusual bruising or bleeding right away.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
2 reports — tap to read
a) Giving apixaban together with ketoconazole produced a 62% rise in apixaban Cmax and a 97% rise in apixaban AUC relative to apixaban given by itself. A 10 mg oral dose of apixaban was given 4 days after starting ketoconazole 400 mg once daily in 18 subjects 3.
b) In a drug interaction study, giving apixaban together with ketoconazole 400 mg produced increases in apixaban Cmax and AUC of roughly 1.6-fold and 2-fold, respectively 2.
Common questions
Can I take Telaprevir and Apixaban together?
Telaprevir can raise apixaban levels and bleeding risk, so your doctor may avoid the combination at low apixaban doses or cut higher doses in half. Do not change anything yourself, and report any signs of bleeding. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Telaprevir 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 Telaprevir and Apixaban interaction managed?
This combination can be managed by your care team. Based on the documented guidance: If you take apixaban 2.5 mg twice daily, this combination is generally avoided. If you take 5 mg or 10 mg twice daily, your team may reduce your apixaban dose by half while you are on telaprevir. Any dose change should be made by your prescriber and individualized to you. What you should do: Keep taking both medic… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Telaprevir 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 (3)
- Product Information: ELIQUIS(R) oral tablets, tablets for suspension, apixaban oral tablets, tablets for suspension. Bristol-Myers Squibb Company (per Manufacturer), Princeton, NJ, 2025. DailyMed
- Product Information: ELIQUIS(R) oral film coated tablets, apixaban oral film coated tablets. Bristol-Myers Squibb Company (per Dailymed), Princeton, NJ, 2024. DailyMed
- Frost CE, Byon W, Song Y, et al: Effect of ketoconazole and diltiazem on the pharmacokinetics of apixaban, an oral direct factor Xa inhibitor. Br J Clin Pharmacol 2015; 79(5):838-846.
Keep reading about Telaprevir
Keep reading about Apixaban
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