i used levaquin for 7 days before stoping. i was taking 500 mg and right away i found i could not sleep. my lungs filled up to the point that i had to go to the emergency room for treatment. after 2 weeks of no more then 2 hours of sleep a night, my doctor gave me ambein. a sleeping pill. i have had anxiety attacks, panic attacks and a feeling that some thing was terribly wrong and even had suicidal thoughts. i have never felt so sad and depressed in my whole life. it has been a couple of weeks since i quit the levaquin and i have times that my heart races, blood pressure go's up, and feel like i can't get enough air. i get a pressure head ache above my eyes and aspirin just don't seem to help. i didn't know what was causeing this till i read postings from this site. thanks for the info and i hope this don't last as long as it has for most of you. at 66 years old, i don't need this kind of problem, luck to us all----******