Seòrsachadh: Tha drogaichean antibacterial air an roinn ann an dà roinn: antibiotics agus drogaichean antibacterial synthetigeach. Is e na antibiotics ris an canar metabolites air an dèanamh le meanbh-fhàs-bheairtean,  a dh’ fhaodadh casg a chuir air fàs no cuid de meanbh-fhàs-bheairtean eile a mharbhadh.  Tha na drogaichean antibacterial synthetigeach ris an canar stuthan antibacterial air an dèanamh le daoine tro synthesis ceimigeach, nach eil air an dèanamh le metabolism microbial.

Antibiotics: Tha antibiotics mar as trice air an roinn ann an ochd roinnean: 1. Penicillin: penicillin, ampicillin, amoxicillin, msaa; 2. Cephalosporins (pioneermycins): cephalexin, cefadroxil, ceftiofur, cephalosporins, msaa; 3. Aminoglycosides: streptomycin, gentamicin, amikacin, neomycin, apramycin, msaa; 4. Macrolides: erythromycin, roxithromycin, tylosin, msaa; 5. Tetracyclines: oxytetracycline, doxycycline, aureomycin, tetracycline, msaa; 6. Chloramphenicol: florfenicol, thiamphenicol, msaa; 7. Lincomycins: lincomycin, clindamycin, msaa; 8. roinnean eile: colistin sulfate, etc.