<prompt> All the following drugs action pseudomonas infection EXCEPTCarbenicillineAzlocillinePeperacillineAzithromycin  <response>: Azithromycin 730-KDT 6thDrugs which acts on Pseudomonas Carbenicilline Cefoperazone Tobramycin Acetic acid Ticarcilline Aztreonam Sisomicin Silver sulphadiazine Azlacilline Imipenem Amikacin Tetracyclines Mezlocilline Cefotaxime Nitilmicin Cefepime Peperacilline Ciprofloxacine Gentamicin Moxalactam Norfloxacin Polymyxin -B Ceptazidime Ofloxacin Mafenide Pefloxacin Azithromycin - It is more active than other macrolide against H. influenzae Usefully active against a number of important gram negative organisms It is not active against erythromycin resistant bacteria 