buy priligy generic Third generation cephalosporin with broad spectrum gram negative activity; has lower efficacy against gram positive organisms but higher efficacy against resistant organisms; highly stable in presence of beta lactamases penicillinase and cephalosporinase of gram negative and gram positive bacteria; bactericidal activity results from inhibiting cell wall synthesis by binding to 1 or more penicillin binding proteins; exerts antimicrobial effect by interfering with synthesis of peptidoglycan major structural component of bacterial cell wall; bacteria eventually lyse because activity of cell wall autolytic enzymes continues while cell wall assembly is arrested