<prompt> All true about cephalosporins EXCEPT:Ceftazimide is a 3rd generation cephalosporinCefoperzone has got antipseudomonal effect.Cefoxitin has got no activity against anaerobesCephalosporins act by inhibiting cell wall synthesis  <response>: This 2nd generation cephalosporin was developed subsequent to the first generation compounds and are more active against gram-negative organisms, anaerobes, but none inhibits P. aeruginosa ESSENTISLS OF MEDICAL PHARMACOLOGY 