title: Assessment of the bioequivalence of brand and biogeneric formulations of abciximab for the treatment of acute coronary syndrome: a prospective, open-label, randomized, controlled study in Korean patients.
abstract: BACKGROUND
  Abciximab has been found to reduce major adverse cardiovascular events in patients with acute coronary syndrome (ACS). A previous study reported on the tolerability of biogeneric abciximab in patients with ACS. This formulation has been approved by the Korea Food and Drug Administration and is currently being marketed. Its ex vivo antiplatelet effect, however, has not been compared with that of branded abciximab.
  
  
  OBJECTIVE
  The purpose of the present study was to compare ex vivo antiplatelet activity, angiographic outcome, and bleeding complications between biogeneric and branded abciximab.
  
  
  METHODS
  This prospective, open-label, randomized, controlled study was conducted in Korea. Patients with ACS who underwent percutaneous coronary intervention (PCI) were randomized to receive biogeneric abciximab or branded abciximab. All patients received intracoronary unfractionated heparin 70 IU/kg and either biogeneric or branded abciximab 0.25 mg/kg IV bolus approximately 10 minutes before undergoing PCI, followed by a 0.125 microg/kg/min 12-hour infusion of the same formulation. The antiplatelet effect of both drugs was assessed at 3 time points (at baseline, and 10 minutes and 24 hours after the end of the bolus infusion) using a validated rapid platelet-function assay.
  
  
  RESULTS
  In total, 37 patients (30 men and 7 women; 19 receiving biogeneric abciximab and 18 receiving branded abciximab) were included. Patient demographics did not differ significantly between the 2 groups (16 men [84.2%] and 3 women [15.8%] in the biogeneric group vs 14 men [77.8%] and 4 women [22.2%] in the branded group; mean [SD] age, 65 [11] vs 60 [10] years; weight, 64.6 [8.7] vs 67.9 [10.1] kg, respectively). The bolus and the continuous infusion of the biogeneric and branded formulations achieved similar levels of platelet inhibition, with a mean (SD) inhibition of platelet aggregation >90% at 10 minutes after the end of the bolus infusion (94.7% [8.2%] vs 92.6% [16.9%], respectively; P = NS) and >65% at 24 hours (68.1% [9.8%] vs 70.9% [9.7%]; P = NS) compared with baseline. One thrombolysis in myocardial infarction major bleeding complication (retro-peritoneal hemorrhage) was reported in a patient who received biogeneric abciximab.
  
  
  CONCLUSIONS
  There were no statistically significant differences in the antiplatelet effects of these 2 formulations in this small, selected population of Korean patients with ACS.
authors.affiliation: Department of Internal Medicine, Cardiovascular Center, Seoul National University Hospital, Seoul 110-744, Korea.
authors.forename: Dong-Hyun
authors.initials: DH
authors.lastname: Choi
authors.forename: Jung-Won
authors.initials: JW
authors.lastname: Suh
authors.forename: Kyung-Woo
authors.initials: KW
authors.lastname: Park
authors.forename: Hyun-Jae
authors.initials: HJ
authors.lastname: Kang
authors.forename: Hyo-Soo
authors.initials: HS
authors.lastname: Kim
mesh_terms: D000077284:Abciximab; D054058:Acute Coronary Syndrome / Q000628:therapy*; D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000009:adverse effects / Q000493:pharmacokinetics*; D000925:Anticoagulants / Q000008:administration & dosage / Q000009:adverse effects / Q000493:pharmacokinetics*; D044466:Asian People; D016568:Drugs, Generic / Q000008:administration & dosage / Q000493:pharmacokinetics / Q000627:therapeutic use; D005260:Female; D006470:Hemorrhage / Q000139:chemically induced; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000008:administration & dosage / Q000009:adverse effects; D007262:Infusions, Intravenous; D007723:Korea; D008297:Male; D008875:Middle Aged; D010979:Platelet Function Tests; D011446:Prospective Studies; D012187:Retroperitoneal Space; D013810:Therapeutic Equivalency
chemical_list: D000911:Antibodies, Monoclonal; D000925:Anticoagulants; D016568:Drugs, Generic; D007140:Immunoglobulin Fab Fragments; D006493:Heparin; D000077284:Abciximab