I was hospitalized on 1-3-2007 and was placed on levaquin via IV and continued til I was released on 1-12-2007. After I was released they placed me on 750 mg for another 5 days. I started to feel my heart beat really fast, slow down , then speed back up. It felt like my heart was coming through my chest. I didn't know why I was feeling like this because I was on so many meds during my stay in the hospital. But I remember feeling most of the symtoms immediately after they put the IV in. I couldn't sleep,very nervous, never comfortable, I would start to cry for no reason,lack of appetite. I decided to not take Levaquin on 1-16-07 to see how I would feel and I felt like my old self even though I'm healing form a hysterectomy,hemotoma and anemia. I was amazed at the sudden change in yhe way I felt. I will not be continuing Levaquin. Oh it also was interfering with my bowel. I know it's not the iron because the Dr. took me off of it because it causes constipation. If I were you I would not take this med., I think it should be removed before it kills someone.