I was put on a 500mg Levaquin dose 5 days ago for Kidney infection. Each day I felt worse, but I was thinking it was the infection. I am so tired but couldn't sleep, my stomach aches, burns, cramps and my back hurts so bad. I have had a hard time eating or drinking at all. It feels as if I am trying to digest broken glass. Today someone directed me to this site and my eyes about popped out! I immediately called my doctor and was seen. She took me off the Levaquin right away. Hope it doesn't take too long for me to feel better.