The gatifloxacin ear drop is prepared with gatifloxacin or its salt as the main component and the supplementary materials including glycerin, ethanol and sterilized water for injection, pure water or distilled water. The present invention also discloses the preparation process of the gatifloxacin ear drop. As one fourth generation oxyquinolone type antibacterial medicine, the gatifloxacin ear drop has high bioavailability, reduced medicine taking times, less systemic untoward reaction, high patient's compliance and less drug resistance. |