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Does Heparin Sodium Interact with Andexanet Alfa?

Heparin Sodium and Andexanet Alfa have a major drug interaction according to U.S. FDA drug labeling data. Andexanet binds to heparin-bound antithrombin III and may reduce heparin's anticoagulant effect, potentially leading to serious and life-threatening thrombotic events. Avoid heparin use after andexanet alfa for Factor Xa inhibitor reversal. The mechanism involves binding to heparin-bound antithrombin iii reduces anticoagulant effect. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Major
Management
Close medical supervision required
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Heparin Sodium and Andexanet Alfa occurs because binding to heparin-bound antithrombin iii reduces anticoagulant effect. Clinically, this means andexanet binds to heparin-bound antithrombin iii and may reduce heparin's anticoagulant effect, potentially leading to serious and life-threatening thrombotic events. avoid heparin use after andexanet alfa for factor xa inhibitor reversal. This is classified as a major interaction, meaning it could cause serious harm if not properly managed. Your healthcare provider may need to adjust dosages, substitute one medication, or increase monitoring frequency.

What To Tell Your Doctor or Pharmacist

If you are taking Heparin Sodium and your doctor is considering prescribing Andexanet Alfa (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask how frequently you should be monitored while these are co-prescribed
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Heparin Sodium(Heparin Sodium)+💊 Andexanet Alfa(Andexxa)

Severity & Interaction Details

⚠️
major
Use with caution — major interaction
Serious risk of clinically significant harm. Generally avoid; if used, monitor closely.
Severity scale
MinorContra
On record
Yes
Drug A class
—
Drug B class
—
Source
NLP:heparin sodium

What this means in plain English

Andexanet binds to heparin-bound antithrombin III and may reduce heparin's anticoagulant effect, potentially leading to serious and life-threatening thrombotic events. Avoid heparin use after andexanet alfa for Factor Xa inhibitor reversal.

What the FDA label says

"Binding to heparin-bound antithrombin III reduces anticoagulant effect"

📖 Source: NLP:heparin sodium

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Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine. For informational purposes only. Always consult your pharmacist or physician.