Recently, new oral cephalosporins with broad spectra of activity and high stability against various β-lactamases, such as cefixime1)(CFIX), ceftibutene2)(CFTB), and cefdinir3)(CFDN), have been developed and introduced to clinical practice. In particular, CFDN, which was discovered in our laboratories, has excellent antibacterial activity against both Gram-positive and-negative bacteria and high oral absorption. 3) CFDN has shown excellent clinical ...