cefazolin 1 gm , cefazolin 2 gm , cefoxitin 1 gm , cefoxitin 2 gm , cefonicid 1 gm , cefotetan 1 gm , ceftizoxime 1 gm , ampicillin 2 gm , and piperacillin 4 gm were all administered in a single dose .
C0002680
ampicillin
C0031955
piperacillin