several investigators have examined combining new agents , such as the third-generation cephalosporins ( cefotaxime , ceftriaxone , ceftizoxime , ceftazidime , cefoperazone , and moxalactam ) , aztreonam , or the ureidopenicillins , with amikacin .
C0007554
cefotaxime
C0007561
ceftriaxone