Ciprofloxacin is a quinolone antibiotic, and it is most commonly used to prevent bacterial infection. It comes under the drug class of Fluoroquinolone. It does this by entering into the bacterial cells and stopping the bacterial enzyme called DNA gyrase. The enzyme is involved in replicating and repairing the genetic material of the bacteria. If this enzyme doesn’t work, the bacteria can’t reproduce or repair themselves and ultimately kills bacteria.