I was prescribed Levaquin 750mg for pneumonia. The first 2 days I felt ok, then the 3rd day about an hour or two after I took the pill I was getting really anxious and depressed. I was acutally having thought of suicide! The anxiousness and depression lasted for about 4 to 5 hours after the start of them. Also on the third day, I was experiencing my heart pounding and some muscle cramping. The 4th day the symptoms started getting a little worse. And so today, being the 5th day of my 5 day treatment I feel like a truck hit me. I called my Dr. and he told me not to take todays dose, that Levaquin is probably causing the symptoms that I'm having. As I type this I've had to stop numerous times because of my fingers and hands cramping. Also I dont think I've ever sweat this much in my life. I probably would have never called my doctor about my symptoms if I didnt stumble across this page.