I don't think this is a new side effect, but I don't see a list here anywhere. I have terrible joint and muscular pain all over my body after taking 10 days of Levaquin for kidney infection. Although I finished the medicine 3 days ago, the pain it still intense. I also have intermittent ringing in my ears and other symptoms. It is interfering in my life and I resent not being told the risks before I took it.