Klasifikasi: Obat antibakteri dipérang dadi rong kategori: antibiotik lan obat antibakteri sintetik. Sing diarani antibiotik yaiku metabolit sing diprodhuksi dening mikroorganisme,  sing bisa nyandhet wutah utawa mateni mikroorganisme tartamtu liyane.  Obat antibakteri sintetik sing diarani minangka zat antibakteri sing diprodhuksi dening wong liwat sintesis kimia, ora diprodhuksi dening metabolisme mikroba.

Antibiotik: Antibiotik umume dipérang dadi wolung kategori: 1. Penisilin: penisilin, ampicillin, amoxicillin, lsp; 2. Cephalosporins (pioneermycins): cephalexin, cefadroxil, ceftiofur, cephalosporins, lan liya-liyane; 3. Aminoglycosides: streptomycin, gentamicin, amikacin, neomycin, apramycin, lan liya-liyane; 4. Macrolides: erythromycin, roxithromycin, tylosin, lan liya-liyane; 5. Tetracyclines: oxytetracycline, doxycycline, aureomycin, tetracycline, lan liya-liyane; 6. Kloramfenikol: flofenikol, tiamfenikol, lsp; 7. Lincomycins: lincomycin, clindamycin, etc.; 8. Kategori liyane: colistin sulfate, etc.