I am on a treatment of 2 months Levequin (500mg/daily) and also inhaled Colistin 2 x/daily. I have taken Levequin in the past but never had a problem with it, however when I first started taking it a couple of weeks ago I experienced nausea and after taking it for a few days that seemed to stop but now it is starting again and it begins within an hour or two after I take it and I have a feeling of weakness and some nausea and almost feel so weak that I might faint. I make sure to take eat right after I eat a meal. Has anyone else experienced anything like this? This feeling last for a hour or two then I feel back to normal.