penicillin As a command 12 categories below penicillin Narrow by penicillinase-resistant-antibiotic 2 penicillin-v 1 penicillin-v 1penicillinase-resistant-antibiotic 2amoxicillinampicillinmethicillinnafcillinoxacillinpenicillin-fpenicillin-gpenicillin-openicillin-v-potassiumpiperacillin