<prompt> All of the following fluoroquinolones have been withdrawn exceptTrovafloxacinGatifloxacinGemifloxacinGrepafloxacin  <response>: Gemifloxacin. All others have been withdrawn.Trovafloxacin due to hepatotoxicityGatifloxacin due to hypohyper glycemiaGrepafloxacin due to adverse cardiac events 