I took just two doses of Levaquin for a sinus infection. The first was before bed. I lied awake all night, with brief periods of dosing off, but would rapidily have distrurbing, odd images. In the middle of the night, I got up to discover that my calves and ankles hurt really bad. I didn't associate any of this to the Levaquin. The next morning I took dose 2. I am a school teacher. At work that morning, I couldn't function. I kept becoming confused, disorientated and paranoid. My Principal, concerned, sent me to the ER. That night, I still had disturbing images and felt horribly "drugged" all day. Luckily, I found out what was causing my symptoms, but for a while I was scared. I thought I was losing my mind!!! Really!!! I will never take this drug again.