Bioequivalence Study of Cefprozil Tablets, USP 500 mg Undef Fed Conditions

Inclusion Criteria: * Subject candidates must fulfill all of the following inclusion criteria t be eligible for participation in the study, unless otherwise specified: 1. Healthy adult male or female volunteers, 18 to 55 years of age 2. Weighing at least 52 kg for males and 45 kg for females and within 15% of their ideal weights (table of 'Desirable Weights of Adults', Metropolitan Life Insurance Company, 1983) 3. Medically healthy subjects with clinically normal laboratory profiles and ECGs 4. Females of child bearing potential should either be sexually inactive (abstinent) for 14 days prior to the first dose and throughout the study or be using one of the following acceptable birth control methods: * Surgically sterile (bilateral tubal ligation, hysterectomy, bilateral oophorectomy) 6 months minimum * IUD in place for at least 3 months * Barrier methods (condom, diaphragm) with spermicide for at least 14 days prior to the first dose and throughout the study * Surgical sterilization of the partner (vasectomy for 6 months minimum) * Hormonal contraceptives for at least 3 months prior to the first dose of the study * Other birth control methods may be deemed acceptable e) Post menopausal women with amenorrhea for at least 2 years will be eligible f) Voluntarily consent to participate in the study Exclusion Criteria: * Subject candidates must not be enrolled in the study if they meet any of the following criteria: 1. History or presence of significant cardiovascular, pulmonary, hepatic, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurologic, or psychiatric disease 2. In addition, history or presence of: * alcohol or drug abuse within the past year * hypersensitivity or idiosyncratic reaction to cefprozil, other cephalosporin antibiotics, or penicillin c) Female subjects who are pregnant or lactating d) Subjects who have been on a special diet (for whatever reason) during the 28 days prior to the first dose and throughout the study e) Subjects who through completion of the study, would have donated in excess of: * 500 mL of blood in 14 days * 1500 mL of blood in 180 days * 2500 mL of blood in 1 year f) Subjects who have participated in another clinical trial within 28 days prior to the first dose.