I haven't seen this side effect listed but on the second day of taking Levaquin for an upper respiratory infection I had a yellow streak from the inside corner of my eye down my cheek. I was speaking with a co-worker when she said, "What's wrong with your face?" Knowing this to be a jaundice sign from my liver, I discontinued the Levaquin immediately and called my Dr. I also experience fogginess to the point I shouldn't have been working or driving.