<prompt> CarbenicillinIs effectivr in pseudomonas infectionHas no effect in Proteus infectionIs a macrolide antibioticIs admistered orally  <response>: Carbenicillin Is a Pencillin congener effective against pseudomonas and indole positive Proteus which are not inhibited by Pencillin G It is inactive orally and excreted rapidly in urine It is sensitive to Pencillinase and acid So admistrmeed parenterally Refer KDT 6e p702 