To establish the bioequivalence of 2x5 mg of IVAX warfarin /formulation tablet vs. 10 mg of Coumadin / formulation tablet

Inclusion Criteria:

• Healthy males according to the following criteria: Based upon a complete medical history, including the physical examination, vital signs (blood pressure, pulse rate, temp), 12-lead electrocardiogram, clinical laboratory tests, without clinically significant abnormal findings
• Age ≥ 18 and Age ≤ 45 years
• Body Mass Index (BMI) ≥ 18.0 and BMI ≤ 30.0 kg/m2
• Signed and dated written informed consent prior to admission to the study in accordance with GCP (Good Clinical Practice) and the local legislation

Exclusion Criteria:

• A history of clinically significant gastrointestinal, renal, hepatic, neurologic, hematologic, endocrine, oncologic, pulmonary, immunologic, psychiatric, or cardiovascular disease or any other condition which, in the opinion of the investigator, would jeopardize the safety of the subject or impact the validity of the study results
• A history of allergic or adverse responses to warfarin or any comparable or similar product
• Subjects who (for whatever reason) had been on an abnormal diet or had substantial changes in eating habits within 30 days prior to study initiation
• Subjects could not have made a blood donation of one pint or more within 30 days prior to study initiation
• Subjects could not have made a plasma donation within 14 days of study initiation
• Participation in a clinical trial within 30 days prior to study initiation
• Use of any over-the-counter (OTC) medication, including vitamins, herbal products, and dietary supplements, within 7 days prior to or during the study
• Use of any prescription medication within 7 days prior to or during the study
• Treatment with any known enzyme altering drugs such as barbiturates, phenothiazines, cimetidine, carbamazepine, phenytoin, rifampin, rifabutin, glucocorticoids, diltiazem, ketoconazole, MAOI (monoamine oxidase inhibitor), antidepressants, neuroleptics, verapamil, quinidine, erythromycin, etc., within 30 days prior to or during the study
• Smoking or use of tobacco products within 6 months prior to or during the study. Smoking status was verified by a urine cotinine screen.
• Female subjects
• Positive blood screen for Human Immunodeficiency Virus, Hepatitis B, or Hepatitis C
• Positive screen for alcohol, drugs of abuse, or cotinine and history or presence of alcoholism or drug abuse within 6 months prior to the study start
• Subjects could not have taken aspirin or any aspirin-containing medications or any antiplatelet or anticoagulant medication within 7 days prior to the study, for the duration of the study and for 14 days after the last dose of study medication
• aPTT (activated partial thromboplastin time) or INR (international normalized ratio) results unacceptable to principal investigator
• Inability to comply with dietary regimen of trial site