<prompt> All of the following fluoroquinolones have been withdrawn ExceptTrovafloxacinGatifloxacinGemifloxacinGrepafloxacin  <response>: Except for Gemifloxacin, all others have been withdrawnTrovafloxacin due to hepatotoxicityGatifloxacin due to hypohyperglycemiaGrepafloxacin due to adverse cardiac events 