I was relieved to see other peoples side effects. I thought I was just losing my mind. Since I started on levaquin, 1st time about a month ago, and currently finishing a script, I have been experiencing severe pain in all my joints upon awakening in the morning. I live on the second floor and to get out I feel and look like Frankenstein getting down the stairs. My achilles, knees, hips, shoulders and neck are most affected. The pain does seem to subside somewhat during the day, but believe me I am still in a state of moderate discomfort. I called my MD and he said he had never heard of such a thing and to finish the RX. If I am still uncomfortable in 2 weeks he wants me to call him so he can do a blood test to check for rheumatoid arthritis. Again thanx to all who have taken the time to write out their troubles related to levaquin therapy, now I don't feel alone or crazy. best luck and quick healing to all affected by this antibiotic.