Moxifloxacin
"I've been on a 7 day schedule of the Avelox, it has worked pretty well to clear up the bacterial infection on my lung.  However, I have experienced pretty bad diarrhea that started about 3 days into the schedule. The rest of the symptoms have been mild such as nausea, feeling cloudy, etc. I am really looking forward to taking the last pill, this medicines side effects are not too pleasant."