Sleeplessness and when I could sleep, I had terrible nightmares. I was taking Levaquin 500 for cellulitis in my finger. My father had passed away recently so at first I attributed the nightmares and restlessness to that. But after thinking about the aggitation, the sleeplessness, the nausea, etc...and never having taking the medication before, I decided to research the side effects of Levaquin. I have completed the 10 days prescribed round of medication, but my finger is not healed. I go back to the doctor tomorrow. I will ask for a different anitbiotic!!