Apixaban and Citalopram: 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
Citalopram
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.
You're taking apixaban (Eliquis), a blood thinner, along with citalopram (Celexa), an antidepressant. Each of these can make it a little harder for your blood to clot. Citalopram affects how your platelets stick together, and apixaban already slows clotting, so together they can raise your risk of bleeding.
This concern is mostly theoretical, but it's worth taking seriously. Watch for things like unusual bruising, nosebleeds that won't stop, pink or red urine, black stools, or vomit that looks like coffee grounds. If you notice heavy or unusual bleeding, get help right away. The good news is your care team can safely manage this combination by keeping an eye on you.
Effect: Additive risk of bleeding, potentially serious, from combining apixaban (direct factor Xa inhibitor) with an SSRI (citalopram).
Mechanism: Pharmacodynamic, additive impairment of hemostasis. SSRIs deplete platelet serotonin and impair platelet aggregation; apixaban inhibits factor Xa. Neither is a prodrug here; this is a PD, not PK, interaction.
- Direction: Increased bleeding risk (additive).
- Onset: Unspecified; apixaban PD effect persists >=24 h after last dose.
- Evidence: Theoretical.
- Management: Counsel on bleeding signs; discontinue apixaban if active pathological bleeding. Reversal agent (andexanet alfa) or PCC/aPCC/rFVIIa available; routine coagulation monitoring is not useful to gauge apixaban effect.
What happens
An increased risk of bleeding and can cause serious, potentially fatal bleeding
Interaction Deep Dive
The combined use of apixaban, an inhibitor of factor Xa, together with agents that alter hemostasis (for instance SSRI treatment) raises the likelihood of bleeding. Should active pathological bleeding develop, apixaban should be stopped. A product capable of reversing apixaban's anti-factor Xa activity exists. Apixaban's pharmacodynamic effect is anticipated to last for a minimum of 24 hours following the final dose. Patients should be counseled about the signs and symptoms of blood loss and instructed to report these right away or present to an emergency room. In cases of active pathological hemorrhage, apixaban should be discontinued. An agent that reverses the anti-factor Xa activity of apixaban is available, and the pharmacodynamic effect of apixaban can be expected to remain for at least 24 hours after the last dose. Options that may be considered include prothrombin complex concentrate (PCC), activated prothrombin complex concentrate, or recombinant factor VIIa. If PCCs are administered, tracking apixaban's anticoagulant effect through a clotting test (PT, INR, or aPTT) or anti-factor Xa (FXa) activity offers no benefit and is not recommended. Activated oral charcoal decreases apixaban absorption and consequently lowers its plasma concentration1.
Why it happens (mechanism)
Additive effects on hemostasis
How to manage this interaction
Both drugs can be continued together when your prescriber has weighed the benefits, but the goal is to catch any bleeding early.
- Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise. Do not stop your blood thinner on your own.
- Know the warning signs: unusual bruising, prolonged nosebleeds, blood in urine or stool, black tarry stools, coughing or vomiting blood, or severe headache.
- Report bleeding immediately or go to an emergency room if it is heavy or won't stop.
Ask your pharmacist or prescriber whether your dose or monitoring should be individualized. Reversal treatments exist if serious bleeding occurs.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Apixaban and Citalopram together?
Taking citalopram with apixaban can add up to a higher bleeding risk, so watch closely for unusual bleeding or bruising and report it right away. Keep taking both as prescribed and let your pharmacist or doctor know you use them together. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Apixaban and Citalopram 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 Apixaban and Citalopram interaction managed?
Both drugs can be continued together when your prescriber has weighed the benefits, but the goal is to catch any bleeding early. Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise. Do not stop your blood thinner on your own. Know the warning signs: unusual bruising, prolonged nosebleeds, blood in urine or stool, black tarry stools, coughing or vomiting blood, or se… 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:
- Supplements for Leg Circulation Safe With Citalopram and Lisinopril
- Provitalize With Levothyroxine, Valacyclovir, and Citalopram
- Interaction Between Propranolol And Citalopram
- Can You Take Baobab Fiber With Eliquis (Apixaban)?
- Can You Replace an Evening Apixaban Dose With Berberine?
- Can I Take Ginkgo With Apixaban (Eliquis) and Atorvastatin?
Questions for your pharmacist
- Does my dose of Apixaban or Citalopram 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: ELIQUIS(R) oral film coated tablets, apixaban oral film coated tablets. Bristol-Myers Squibb Company (per Dailymed), Princeton, NJ, 2024. DailyMed
Keep reading about Citalopram
Keep reading about Apixaban
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