I was prescribed Levaquin (500mg. for 10 days) for pnueamona. By day three I wanted to jump out of my skin. I felt like I was going crazy, I had the shakes, dizziness, trouble catching my breath, couldn't sleep etc. I called the the doctor and he said keep taking the medcine. By day 6 I had it...I no longer could take it, I stopped the medicine, come to find out I talked to other people and they had the same symptoms...sometime of bad reaction...I have been off of this for two full days and still feel strange....This medicine is not good....they need more warnings....