I am one miserable person. Last Wednesday I went to my doctor for a severe sinus infection that was rapidly becoming bronchocial. I was prescribed Levaquin - 500 mg for 10 days. It is now day 7 and that's it for me. No more. For two days my shoulder feels like someone is stabbing me and I can hardly lift my arm. My right knee hurts so bad I can't lift my leg. I do have knee problems but they seem to be worse. Everything is popping and last night I vomited. I am well over the sinus infection and I am faxing my doctor right now to let him know about this. I am getting worse everyday and I just hope now that I've stopped this poison, that I have not ruined my tendons or have to go through hell to get my mobility back.