tokens: Healthy subjects received the following regimens , dosed to steady state : trovafloxacin 300 mg / 24 h ; ciprofloxacin 400 mg / 12 h ; trovafloxacin 300 mg / 24 h plus cefepime 2 g / 12 h , and ciprofloxacin 400 mg / 12 h plus cefepime 2 g / 12 h .