The CHARM II system detects following Beta-lactam drugs:
Penicillin, Cephapirin, Ceftiofur, Ampicillin, Amoxicillin, Cloxacillin, Oxacillin, Dicloxacillin, Cefquinome, Nafcillin, Cefazolin, Cefodroxil, Cefotaxime, Cephalexin, Cephradine, Hetacillin, Penethamate, Piperacillin, Ticarcillin