ATC Group: J01M Quinolone antibacterials

Anatomical Therapeutic Chemical Classification System


Quinolone antibacterials

Hierarchical Position

Quinolone antibacterials



Active Ingredients

Chemical substance

Ciprofloxacin is a fluoroquinolone antibacterial agent. The bactericidal action of ciprofloxacin results from the inhibition of both type II topoisomerase (DNA-gyrase) and topoisomerase IV, required for bacterial DNA replication, transcription, repair and recombination.

Gatifloxacin is an 8-methoxyfluoroquinolone with a 3-methylpiperazinyl substituent at C7. The antibacterial action of gatifloxacin results from inhibition of DNA gyrase and topoisomerase IV. The mechanism of action of fluoroquinolones including gatifloxacin is different from that of aminoglycoside, macrolide, and tetracycline antibiotics. Therefore, gatifloxacin may be active against pathogens that are resistant to these antibiotics and these antibiotics may be active against pathogens that are resistant to gatifloxacin.

Levofloxacin is a synthetic antibacterial agent of the fluoroquinolone class. As a fluoroquinolone antibacterial agent, levofloxacin acts on the DNA – DNA-gyrase complex and topoisomerase IV.

Lomefloxacin is a synthetic broad-spectrum antimicrobial agent for oral administration. Lomefloxacin should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria.

Moxifloxacin, a fourth-generation fluoroquinolone, has in vitro activity against a wide range of Gram-positive and Gram-negative pathogens. The bactericidal action of moxifloxacin results from the inhibition of both type II topoisomerases (DNA gyrase and topoisomerase IV) required for bacterial DNA replication, transcription and repair.

Nalidixic acid, is a quinolone antibacterial agent for oral administration. Nalidixic acid has marked antibacterial activity against gram-negative bacteria including Enterobacter species, Escherichia coli, Morganella Morganii; Proteus Mirabilis, Proteus vulgaris, and Providencia rettgeri.

Norfloxacin has a rapid bactericidal action and inhibits synthesis of bacterial deoxyribonucleic acid (DNA). Norfloxacin has a broad spectrum of antibacterial activity against gram-positive and gram-negative aerobic bacteria.

Ofloxacin is a quinolone-carboxylic acid derivative with a wide range of antibacterial activity against both Gram-negative and Gram-positive organisms. The primary mode of action of the quinolones is the specific inhibition of bacterial DNA gyrase. This enzyme is required for DNA replication, transcription, repair and recombination.

Pefloxacin is a fluoroquinolone antibiotic with broad-spectrum antimicrobial activity. Pefloxacin inhibits the activity of microbial DNA gyrase and topoisomerase IV. This disrupts DNA replication and prevents cell division.

Prulifloxacin is a wide spectrum antibacterial agents belonging to the fluoroquinolone group and provided with high efficacy. Prulifloxacin exerts its antibacterial activity by the selective inhibition of the DNA-gyrase, an essential enzyme present in bacteria and involved in duplication, transcription and repair of DNA.