Adequate therapy forβ-lactamase-producing pathogens
| Antibiotic | ESBL | AmpC |
| Third-generation cephalosporins | – | – |
| Cefepime | – | +++ |
| Fluoroquinolones | +/– | + |
| Piperacillin/tazobactam | +/– | +/– |
| Tigecycline | ++ | ++ |
| Carbapenem | +++ | +++ |
ESBL: extended-spectrum β-lactamases; AmpC: Ampicillin resistance gene C. –: not effective; +: effective; ++: more effective; +++: most effective; +/–: effective against some, but not all, β-lactamases.