Recombinant Antithrombin
Atryn is a brand-name anticoagulant medication containing recombinant antithrombin III (antithrombin alfa). It is used to prevent venous thromboembolism in patients with hereditary antithrombin deficiency, particularly during high-risk situations such as surgery or pregnancy. The medication is administered by intravenous infusion and replaces or supplements the natural antithrombin in the blood.
Atryn is a recombinant antithrombin medication used to prevent blood clots in patients with hereditary antithrombin deficiency.
Key facts at a glance
- RxNorm
- 834852
- Generic
- Atryn
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Prevention of venous thromboembolism in patients with hereditary antithrombin deficiency, particularly during perioperative periods, labor and delivery, or other high-risk situations when anticoagulant therapy is indicated.
Atryn is a recombinant form of human antithrombin III, a natural protein that inhibits clotting factors in the blood. It works by inactivating thrombin and other coagulation factors, thereby reducing the risk of abnormal blood clot formation.
This is a specialty medication typically administered in healthcare settings by healthcare professionals. Patients should be monitored for signs of bleeding or allergic reactions. It is contraindicated in patients with known hypersensitivity to antithrombin products or hamster protein. Pregnancy category C; should be used during pregnancy only if clearly needed.
Official drug label
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed September 2, 2026. · Read our editorial policy