AT activity inhibits many clotting factors in the coagulation cascade in 3 key steps2-4

Procoagulation factors bind to AT

Once bound to AT, procoagulation factors are cleared

The expansion of existing clots and formation of new clots are prevented

Image showing how AT disrupts the production of fibrin which destabilizes clot formation
  • Antithrombin is a thromboprotective protein that inhibits the coagulation enzymes in a slow, progressive manner when heparin is absent. These enzymes include factor Xa and thrombin, and to a lesser extent, factors IXa, XIa, XIIa, and VIIa24
  • Antithrombin plays a key role in anticoagulation by preventing the activation of coagulation-promoting proteins except at the site of injury25
  • Antithrombin participates in a feedback loop in which blood can clot rapidly when needed but does not clot all of the time25

 

Learn more about:

THE RISKS OF LOW AT: See how THROMBATE III replaces missing AT

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IMPORTANT SAFETY INFORMATION


THROMBATE III® (antithrombin III [human]) is indicated in patients with hereditary antithrombin deficiency for treatment and prevention of thromboembolism and for prevention of perioperative and peripartum thromboembolism.

Hypersensitivity reactions may occur. Should evidence of an acute hypersensitivity reaction be observed, promptly interrupt the infusion and begin appropriate treatment.

Because THROMBATE III is made from human blood, it may carry a risk of transmitting infectious agents, eg, viruses, the variant Creutzfeldt-Jakob disease (vCJD) agent, and, theoretically, the Creutzfeldt-Jakob disease (CJD) agent. There is also the possibility that unknown infectious agents may be present in the product.

Perform coagulation tests to avoid excessive or insufficient anticoagulation and monitor for bleeding or thrombosis. Measure functional plasma AT levels with amidolytic or clotting assays; do not use immunoassays.

In clinical studies, the most common adverse reactions (≥ 5% of subjects) were dizziness, chest discomfort, nausea, dysgeusia, and pain (cramps).

The anticoagulant effect of heparin is enhanced by concurrent treatment with THROMBATE III in patients with hereditary AT deficiency. Thus, in order to avoid bleeding, the dosage of heparin (or low molecular weight heparin) may need to be reduced during treatment with THROMBATE III.

Please see full Prescribing Information for THROMBATE III.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit http://www.fda.gov/medwatch, or call 1-800-FDA-1088.

References: 1. THROMBATE III [Prescribing Information]. Research Triangle Park, NC: Grifols Therapeutics LLC. 2. Maclean PS, Tait RC. Hereditary and acquired antithrombin deficiency: epidemiology, pathogenesis, and treatment options. Drugs. 2007;67(10):1429-1440. 3. Li W, Johnson DJ, Esmon CT, Huntington JA. Nat Struct Mol Biol. 2004;11(9):857-862. 4. James AH, Konkle BA, Bauer KA. Prevention and treatment of venous thromboembolism in pregnancy and patients with hereditary antithrombin deficiency. Int J Womens Health. 2013;5:233-241. 5. Wolberg AS. Blood Rev. 2007;21(3):131-142. 6. Davi G, Patrono C. N Engl J Med. 2007;357(24):2482-2494. 7. Kottke-Marchant K, Duncan A. Antithrombin deficiency: issues in laboratory diagnosis. Arch Pathol Lab Med. 2002;126(11):1326-1336. 8. Mitton BA, Steineck A. Antithrombin deficiency. eMedicine from WebMD. http://emedicine.medscape.com/article/198573-overview. Updated August 22, 2019. Accessed September 4, 2020. 9. Patnaik MM, Moll S. Inherited antithrombin deficiency: a review. Haemophilia. 2008;14(6):1229-1239.10. Pabinger I, Schneider B. Thrombotic risk in hereditary antithrombin III protein C, or protein S deficiency. Arteroscler Thromb Vasc Biol. 1996;16(6):742-748. 11. Ranucci M. Antithrombin III: key factor in extracorporeal circulation. Minerva Anestesiol. 2002;68(5):454-457. 12. Foy P, Moll S. Thrombophilia: 2009 update. Curr Treat Options Cardiovasc Med. 2009;11(2):114-128. 13. AABB, American Red Cross, America's Blood Centers, Armed Services Blood Program. Circular of information for the use of human blood and blood components. October 2017. http://www.aabb.org/tm/coi/Documents/coi1017.pdf. Accessed September 4, 2020. 14. Wells PS, Blajchman MA, Henderson P, et al. Am J Hematol. 1994;45:321-324. 15. US Census Bureau, Population Division. US and World Population Clock. http://www.census.gov/ popclock/. Accessed February 13, 2020. 16. Khawar H, Kelley W,Guzman N. Fresh frozen plasma. In: StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK513347/. Updated October 7, 2019. Accessed February 10, 2020. 17. Hellgren M, Tengborn T, Abildgaard U. Pregnancy in women with congenital antithrombin III deficiency: experience of treatment with heparin and antithrombin. Gynecol Obstet Invest. 1982;14:127-141. 18. Franchini M, Veneri D, Salvagno GL, Manzato F, Lippi G. Inherited thrombophilia. Crit Rev Clin Lab Sci. 2006;43(3):249-290. 19. Rodgers GM. Role of antithrombin concentrate in hereditary antithrombin deficiency: an update. Thromb Haemost. 2009;101(5):806-812. 20. Di Minno MND, Dentali F, Lupoli R, Ageno W. Mild antithrombin deficiency and risk of recurrent venous thromboembolism. Circulation. 2014;129(4):497-503. 21. Bucciarelli P, Passamonti SM, Biguzzi E, et al. Low borderline plasma levels of antithrombin, protein C and protein S are risk factors for venous thromboembolism. J Thromb Haemost. 2012;10(9):1783-1791. 22. Centers for Disease Control and Prevention. Venous thromboembolism in adult hospitalizations – United States, 2007-2009. MMWR Morb Mortal Wkly Rep. 2012;61(22):401-404. 23. Finley A, Greenberg C. Review article: heparin sensitivity and resistance: management during cardiopulmonary bypass. Anesth Analg. 2013;116(6):1210-1222. 24. Kovács B, Bereczky Z, Oláh Z, et al. The superiority of anti-FXa assay over anti-FIIa assay in detecting heparin-binding site antithrombin deficiency. Am J Clin Pathol. 2013;140(5):675-679. 25. Olson E, Whitney M, Friedman B et al. In vivo fluorescence imaging of atherosclerotic plaques with activatable cell-penetrating peptides targeting thrombin activity, Integrative Biology, 2012;4(6):595–605. 26. Lloyd-Jones D, Adams RJ, Brown TM, et al; on behalf of the American Heart Association Statistics Committee and Stroke Statistics Subcommittee. Circulation. 2010;121:e46-e215.