Venous thromboembolism (VTE) impacts thousands of patients with hereditary AT deficiency each year1

  • Hereditary AT deficiency (HATD) affects 1 in every 500 to 5000 individuals2-4
    • This range suggests that approximately 63,000 to 630,000 people in the United States (US) are affected5
  • More than 250,000 patients are hospitalized for VTE each year in the US6
    • Up to 7500 (3%) of these patients may have hereditary AT deficiency1

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.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit, or call 1-800-FDA-1088.


  1. Franchini M, Veneri D, Salvagno GL, Manzato F, Lippi G. Inherited thrombophilia. Crit Rev Clin Lab Sci. 2006;43(3):249-290.
  2. THROMBATE III® (antithrombin III [human]) Prescribing Information. Grifols.
  3. Wells PS, Blajchman MA, Henderson P, et al. Prevalence of antithrombin deficiency in healthy blood donors: a cross-sectional study. Am J Hematol. 1994;45:321-324.
  4. Patnaik MM, Moll S. Inherited antithrombin deficiency: a review. Haemophilia. 2008;14(6):1229-1239.
  5. US Census Bureau, Population Division. US and World Population Clocks—POPClocks. Revised May 31, 2012. Accessed August 21, 2012.
  6. Lloyd-Jones D, Adams J, Brown TM, et al; on behalf of the American Heart Association Statistics Committee and Stroke Statistics Subcommittee. Heart disease and stroke statistics—2010 update: a report from the American Heart Association. Circulation. 2010;121:e46-e215.