I was prescribed Levaquin about 3 months ago. Not only did I have horrible insomnia while taking the medication - even after taking ambien and the lunestra - the insomnia continued. It messed my sleep cycle up so bad, that now, even months later, I have major insomnia problems, and am now trying to get off the sleeping pill downward slide too. I recently went to see a sleep specialist MD, and when I told him about taking Levaquin, he knew exactly what I was talking about. This drug is bad news, and really should be taken off the FDA approved list. Please, don't take this drug if you value your sleep (unless you don't mind functioning on 3 hours a night for months).