I just finished a 7-day dose of Levaquin prescribed for a mild UTI. I noticed that for the past week, I have not been feeling like "myself." I have experienced nausea, light-headedness, loss of appetite, weakeness, a bit of insomnia, and just plain old crappiness! I really thought it was just me at first because I took Levaquin about a year ago for the same problem and didn't have any side effects that I can recall. This time, however, they have been very prominent. Your comments really helped to shed some light. I feel better now knowing that my listlessness can probably just be attributed to the Levaquin. Glad I'm done with it!!!