A member of the fluoroquinolone anitbiotics, it has a broad spectrum of antibacterial activity that is great against gram-negative bacteria and good against some gram-positive bacteria and Mycoplasma.
Fluoroquinolones work by deactivating bacterial enzymes necessary for the transcription of DNA. DNA is very tightly coiled in order to fit inside a cell. Segments to be used must be uncoiled by an enzyme called DNA gyrase. The fluoroquinolone antibiotic deactivates DNA gyrase making the reading of DNA impossible. The bacterial cell dies.