My 16 year old son had a bad reaction to Levaquin. His symptoms were severe muscle weakness (he would get exhausted walking from the parking lot to a store and back, severe joint pain (in thumbs, wrists, elbows, knees, and ankles), dizziness (he felt like the room was moving away from him), and headaches (like a severe pressure in the back of his head that was constant and then shooting pains in his his head that would come and go with no reason). I know the first three symptoms are clearly Levaquin related, but I haven't heard much about the headaches from people. Please describe your headaches more. Are they constant? He has had a constant headache that has never gone away for the last 6 months. I should say that before Levaquin which he was given to prevent an infection after sinus surgery, he was wrestling in the 125 pound category and in terrific shape. Please tell me more about the headaches. The other three symptoms have subsided tremendously, but he is still having the headache.