Cefoperazone is a bactericidal Cephalosporin antibiotic which is resistant to most beta-lactamases and active against a wide range of aerobic & anaerobic, Gram positive & Gram negative bacteria. The bactericidal action of Cefoperazone results from the inhibition of bacterial cell wall synthesis. Cefoperazone has a high degree of stability in the presence of beta-lactamases produced by most Gram negative pathogens. Cefoperazone is usually active against organisms which are resistant to other beta-lactam antibiotics because of beta-lactamase production.