I started taking 750 mg of Levaquin as prescribed by my doctor on Wednesday, December 27th for my bacterial pneumonia. The following morning I had arthritis like pain in my shoulders, neck, elbows, calves and even my feet. I also had diarrhea, nausea and fatigue. I continued to take this medication because I thought I was having "flu" like symptoms because of the bacterial pneumonia. I stopped taking the Levaquin today because I had researched the side effects yesterday evening. The nausea and diarrhea have subsided. I still have the arthritis like pain in my joints and fatigue.