Bivalirudin

5 WARNINGS AND PRECAUTIONS Bleeding Events: Bivaluridin for Injection increases the risk of bleeding.( 5.1 , 6.1, 12.2 ) Acute Stent Thrombosis: Increased incidence of acute stent thrombosis in STEMI patients undergoing primary PCI. ( 2.1 , 5.2 ) Thrombotic Risk with Coronary Artery Brachytherapy: An increased risk of thrombus formation, including fatal outcomes, in gamma brachytherapy. ( 5.3 ) 5.1 Bleeding Events Bivalirudin for injection increases the risk of bleeding [see Adverse Reactions ( 6.1 )]. An unexplained fall in blood pressure or hematocrit should lead to serious consideration of a hemorrhagic event and cessation of bivalirudin for injection administration. Monitor patients receiving bivalirudin for injection for signs and symptoms of bleeding. Monitor patients with disease states associated with an increased risk of bleeding more frequently for bleeding. 5.2 Acute Stent Thrombosis in Patients with STEMI Undergoing PCI Acute stent thrombosis (AST) (<4 hours) has been observed at a greater frequency in bivalirudin for injection treated patients (1.2%, 36/2889) compared to heparin treated patients (0.2%, 6/2911) with STEMI undergoing primary PCI. Among patients who experienced an AST, one fatality (0.03%) occurred in a bivalirudin for injection treated patient and one fatality (0.03%) in a heparin treated patient. These patients have been managed by Target Vessel Revascularization (TVR). Patients should remain for at least 24 hours in a facility capable of managing ischemic complications and should be carefully monitored following primary PCI for signs and symptoms consistent with myocardial ischemia. 5.3 Thrombotic Risk with Coronary Artery Brachytherapy An increased risk of thrombus formation, including fatal outcomes, has been associated with the use of bivalirudin for injection in gamma brachytherapy. If a decision is made to use bivalirudin for injection during brachytherapy procedures, maintain meticulous catheter technique, with frequent aspiration and flushing, paying special attention to minimizing conditions of stasis within the catheter or vessels [see Adverse Reactions ( 6.1 )] .

6 ADVERSE REACTIONS Most common adverse reaction (>2%) was bleeding. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact The Dr. Reddy’s Laboratories Inc. at 1-888-375-3784 or the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trialsof another drug and may not reflect the rates observed in practice. In the BAT trials, 79 of the 2,161 (3.7%) patients undergoing PCI for treatment of unstable angina and randomized to bivalirudin for injection experienced major bleeding events which consisted of: intracranial bleeding, retroperitoneal bleeding, and clinically overt bleeding with a decrease in hemoglobin >3 g/dL or leading to a transfusion of >2 units of blood. 6.2 Immunogenicity As with all peptides, there is potential for immunogenicity. The detection of antibody formation is highly dependent on the sensitivity and specificity of the assay. Additionally, the observedincidence of antibody (including neutralizing antibody) positivity in an assay may be influencedby several factors including assay methodology, sample handling, timing of sample collection,concomitant medications, and underlying disease. For these reasons, comparison of the incidenceof antibodies to bivalirudin for injection in the studies described below with the incidence ofantibodies in other studies or to other products may be misleading. In in vitro studies, bivalirudin for injection exhibited no platelet aggregation response against serafrom patients with a history of HIT/HITTS. Among 494 subjects who received bivalirudin for injection in clinical trials and were tested forantibodies, 2 subjects had treatment-emergent positive bivalirudin antibody tests. Neither subjectdemonstrated clinical evidence of allergic or anaphylactic reactions and repeat testing was notperformed. Nine additional patients who had initial positive tests were negative on repeat testing. 6.3 Postmarketing Experience Because postmarketing adverse reactions are reported voluntarily from a population of uncertainsize, it is not always possible to reliably estimate their frequency or establish a causalrelationship to drug exposure. The following adverse reactions have been identified during postapproval use of bivalirudin forinjection: fatal bleeding; hypersensitivity and allergic reactions including reports of anaphylaxis;lack of anticoagulant effect; thrombus formation during PCI with and without intracoronarybrachytherapy, including reports of fatal outcomes; pulmonary hemorrhage; cardiac tamponade;and INR increased.