CEFTIZOXIME IS A SEMISYNTHETIC BROAD SPECTRUM, BETA LACTAMASE RESISTANT CEPHALOSPORIN ANTIBIOTIC FOR PARENTERAL (I.V. OR I.M.) ADMINISTRATION. CEFIZOX IS NOT METABOLIZED, AND IS EXCRETED VIRTUALLY UNCHANGED BY THE KIDNEYS IN 24 HOURS. THIS PROVIDES A HIGH URINARY CONCENTRATION. THE BACTERICIDAL ACTION OF CEFIZOX (STERILE CEFTIZOXIME SODIUM) RESULTS FROM
INHIBITION OF CELL-WALL SYNTHESIS. CEFIZOX IS HIGHLY RESISTANT TO A BROAD SPECTRUM OF BETA-LACTAMASES (PENICILLINASE AND CEPHALOSPORINASE), INCLUDING RICHMOND TYPES I, II, III, TEM, AND IV, PRODUCED BY BOTH AEROBIC AND ANAEROBIC GRAM-POSITIVE AND GRAM-NEGATIVE ORGANISMS.