Cefuroxime binds to one or more of the penicillin-binding proteins (PBPs) which inhibits the final transpeptidation step of peptidoglycan synthesis in bacterial cell wall, thus inhibiting biosynthesis and arresting cell wall assembly resulting in bacterial cell death. Addition of clavulanate inhibits beta-lactamase-producing bacteria; Clavulanic acid has a high affinity for and binds to certain ?-lactamases that generally inactivate Cefuroxime by hydrolyzing its ?-lactam ring. Combining clavulanate potassium with Cefuroxime extends the antibacterial spectrum of Cefuroxime to include many bacteria normally resistant to Cefuroxime and other penicillins and cephalosporins.