I'm 45 and I took Levaquin last Sept 2005 for a sinus infection. ...

I'm 45 and I took Levaquin last Sept 2005 for a sinus infection. Within a day I started having strange side effects including heart racing, terrible insomnia, nightmares and anxiety feelings. After 2 or 3 sleepless nights and thinking I was crazy (like how could these side effects be coming from an antibiotic??), I got on the internet and read about other's similar experiences, and worse. I stopped taking Levaquin immediately, but not before awful knee pain started. It's now May, and my knees and right arch are so painful and I have a very hard time with normal activities. I'm not overweight so that is not causing my knee problems. There ought to be a class action lawsuit, I agree. Just saw my MD who ran lupus tests due to my knee joint swelling (kind of passed off my Levaquin concerns except to say they did find cartiliage damage in rabbit tests). Fortunately lupus tests were all negative as was knee xray. There's a lot I can't do due to the pain. I'm angry, and wondering when this will clear up! Don't take Levaquin unless it's life threatening!!