Sunitinib 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
Sunitinib
Apixaban
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. Apixaban (Eliquis) is a blood thinner that helps prevent dangerous clots. Sunitinib (Sutent) is a cancer medicine. Sunitinib may slow down a 'pump' in your body that normally helps clear apixaban out. If that pump is blocked, more apixaban can build up in your blood.
More apixaban means a higher chance of bleeding, like easy bruising, nosebleeds, or bleeding that is hard to stop. This concern is based on how the drugs work rather than on hard studies in people, but because bleeding is serious, it is worth taking seriously. Please don't change anything on your own. Talk with your doctor or pharmacist so they can guide you safely.
Mechanism: Sunitinib is a potential P-glycoprotein (P-gp) inhibitor; apixaban is a P-gp substrate. Inhibition of P-gp-mediated efflux can reduce apixaban clearance, increasing apixaban exposure (AUC/Cmax) and bleeding risk. Neither drug is a prodrug here, so the effect is straightforward: increased anticoagulant effect.
- Direction: Increased apixaban levels and bleeding risk.
- Evidence: Theoretical; magnitude not quantified.
- Onset: Unspecified.
- Management: Labeling advises avoiding concomitant use. If unavoidable, dose should be individualized by the care team, with close monitoring for bleeding (signs/symptoms, CBC/hemoglobin). Consider an alternative anticoagulant per prescriber judgment.
What happens
Increased apixaban exposure
Interaction Deep Dive
Because apixaban is a substrate of P-gp and sunitinib may act as a P-gp inhibitor, taking the two together can raise apixaban concentrations and heighten the likelihood of bleeding; for this reason, their combined use should be avoided1.
Why it happens (mechanism)
Inhibition of P-gp-mediated efflux transport of apixaban
How to manage this interaction
Keep taking both medicines as prescribed unless your care team tells you otherwise. This combination is flagged to be avoided when possible, so your prescriber may consider a different blood thinner or adjust your plan.
- Your care team may monitor you more closely for bleeding, and your dose can be tailored to you.
- Watch for and report: unusual bruising, nosebleeds, blood in urine or stool, black stools, pink or brown urine, or bleeding that won't stop.
- Ask your pharmacist or doctor before starting any new medicine, including over-the-counter pain relievers like aspirin or ibuprofen.
Raise this specific combination with your prescriber so they can choose the safest option for you.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sunitinib and Apixaban together?
Sunitinib may raise apixaban levels and increase bleeding risk, so this combination is best avoided; check with your doctor or pharmacist and report any signs of bleeding. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sunitinib 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 Sunitinib and Apixaban interaction managed?
Keep taking both medicines as prescribed unless your care team tells you otherwise. This combination is flagged to be avoided when possible, so your prescriber may consider a different blood thinner or adjust your plan. Your care team may monitor you more closely for bleeding, and your dose can be tailored to you. Watch for and report: unusual bruising, nosebleeds, blood in urine or stool, black s… 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 Sunitinib 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)
- Steffel J, Collins R, Antz M, et al: 2021 European Heart Rhythm Association Practical Guide on the use of non-vitamin K antagonist oral anticoagulants in patients with atrial fibrillation. Europace 2021; 23(10):1612-1676.
Keep reading about Sunitinib
Keep reading about Apixaban
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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