| Antimicrobial | ATC Class | |
|---|---|---|
Roman numerals I to III indicate the ranking of antimicrobials based on importance in human medicine as outlined by the Veterinary Drugs Directorate. 1 World Health Organization Collaborating Center for Drug Statistics Methodology. See: www.whocc.no/atc_ddd_index/. | ||
| I | Amoxicillin and enzyme inhibitor (J01CR02) | Combinations of penicillins, including β-lactamase inhibitors (J01CR) |
| Cefixime (J01DD08) | Third-generation cephalosporins (J01DD) | |
| Ofloxacin (J01MA01), ciprofloxacin (J01MA02), norfloxacin (J01MA06), levofloxacin (J01MA12), moxifloxacin (J01MA14) | Fluoroquinolones (J01MA) | |
| Vancomycin (J01XA01) | Glycopeptides (J01XA) | |
| Metronidazole (J01XD01) | Imidazole (J01XD) | |
| Linezolid (J01XX08) | Linezolid (J01XX) | |
| II | Ampicillin (J01CA01), amoxicillin (J01CA04), pivampicillin (J01CA02) | Penicillins with extended spectrum (J01CA) |
| Penicillin G (J01CE01), penicillin V (J01CE02) | β-lactamase sensitive penicillins (J01CE) | |
| Cloxacillin (J01CF02) | β-lactamase resistant penicillins (J01CF) | |
| Cephalexin (J01DB01), cefadroxil (J01DB05) | First-generation cephalosporins (J01DB) | |
| Cefaclor (J01DC04), cefprozil (J01DC10), cefuroxime axetil (J01DC02) | Second-generation cephalosporins (J01DC) | |
| Sulfamethoxazole and trimethoprim (J01EE01), sulfadiazine and trimethoprim (J01EE02) | Combinations of sulfonamides and trimethoprim, including derivatives (J01EE) | |
| Azithromycin (J01FA10), clarithromycin (J01FA09), erythromycin (J01FA01) | Macrolides (J01FA) | |
| Clindamycin (J01FF01) | Lincosamides (J01FF) | |
| Tobramycin (J01GB01) | Aminoglycosides (J01GB) | |
| Nalidixic acid (J01MB02) | Other quinolones, excluding fluoroquinolones (J01MB) | |
| Erythromycin-sulfisoxazole (J01RA02) | Sulfonamide combinations, excluding trimethoprim (J01RA) | |
| Fusidic acid (J01XC01) | Steroid antibacterials (J01XC) | |
| III | Doxycycline (J01AA02), minocycline (J01AA08), tetracycline (J01AA07) | Tetracyclines (J01AA) |
| Chloramphenicol (J01BA01) | Amphenicols (J01BA) | |
| Trimethoprim (J01EA01) | Trimethoprim and derivatives (J01EA) | |
| Sulfamethizole (J01EB02), sulfapyridine (J01EB04), sulfisoxazole (J01EB05) | Short-acting sulfonamides (J01EB) | |
| Sulfadiazine (J01EC02), sulfamethoxazole (J01EC04) | Intermediate-acting sulfonamides (J01EC) | |
| Nitrofurantoin (J01XE01) | Nitrofuran derivatives (J01XE) | |
| Fosfomycin (J01XX01) | Fosfomycin (J01XX) | |
| NC | Methenamine (J01XX05) | Methenamine (J01XX) |
Accessed March 2011.