I was on levaquin august 2008 for a sinus infection. After about day 5 is was in pain. My joints ached terribly. My knees, my hips, my wrists, elbows and fingers. I have undifferentiated connective tissue disease with lupus like symptoms. I thought that maybe the levaquin made me flare. I stopped taking it on day 5 and after a week felt somewhat better. I am on meds for joint pain for my autoimmune condition but still had the joint pain with the levaquin. The physicians assistant that I saw said joint pain wasn't common. From what I'm reading here it's very common.