most empiric therapy in established intra-abdominal infection studies have compared gentamicin and clindamycin , the most popular regimen in the united states over the past 15 years , with a cephalosporin , broad-spectrum penicillin , or aminoglycoside , either alone or together with clindamycin or metronidazole .
C0017436
gentamicin
C0002556
aminoglycoside