For treatment of heparin-induced thrombocytopenia and for the prevention of thrombosis. Bivalirudin is indicated for use in patients undergoing percutaneous coronary intervention (PCI), in patients at moderate to high risk acute coronary syndromes due to unstable angina or non-ST segment elevation in whom a PCI is planned.
Bivalirudin directly and reversibly inhibits thrombin by specifically binding both to the catalytic site and to the anion-binding exosite of circulating and clot-bound thrombin. The action of bivalirudin is reversible because thrombin will slowly cleave the thrombin-bivalirudin bond which recovers the active site of thrombin.
Mode of Action:
Inhibits the action of thrombin by binding both to its catalytic site and to its anion-binding exosite. Thrombin is a serine proteinase that plays a central role in the thrombotic process, acting to cleave fibrinogen into fibrin monomers and to activate Factor XIII to Factor XIIIa, allowing fibrin to develop a covalently cross-linked framework which stabilizes the thrombus; thrombin also activates Factors V and VIII, promoting further thrombin generation, and activates platelets, stimulating aggregation and granule release.
80% proteolytic cleavage
Based on a study by Gleason et al., the no-observed-adverse-effect level (NOAEL) for bivalirudin, administered to rats via intravenous infusion over a 24-hour period, was 2000 mg/kg/24 h.
Seybert AL, Coons JC, Zerumsky K: Treatment of heparin-induced thrombocytopenia: is there a role for bivalirudin? Pharmacotherapy. 2006 Feb;26(2):229-41. Pubmed Dager WE, Dougherty JA, Nguyen PH, Militello MA, Smythe MA: Heparin-induced thrombocytopenia: treatment options and special considerations. Pharmacotherapy. 2007 Apr;27(4):564-87. Pubmed Dang CH, Durkalski VL, Nappi JM: Evaluation of treatment with direct thrombin inhibitors in patients with heparin-induced thrombocytopenia. Pharmacotherapy. 2006 Apr;26(4):461-8. Pubmed Robson R: The use of bivalirudin in patients with renal impairment. J Invasive Cardiol. 2000 Dec;12 Suppl F:33F-6. Pubmed Van De Car DA, Rao SV, Ohman EM: Bivalirudin: a review of the pharmacology and clinical application. Expert Rev Cardiovasc Ther. 2010 Dec;8(12):1673-81. Pubmed Shammas NW: Bivalirudin: pharmacology and clinical applications. Cardiovasc Drug Rev. 2005 Winter;23(4):345-60. Pubmed Gleason TG, Chengelis CP, Jackson CB, Lindstrom P: A 24-hour continuous infusion study of bivalirudin in the rat. Int J Toxicol. 2003 May-Jun;22(3):195-206. Pubmed
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