I have been on Lipitor for about two years. I am extremely stiff particularly my knees. I have been to a rhumatologist who injected my knees with cortizone and synvisc. Neither seemed to help. I walk with great difficulty and have to be extremely careful when going up or down stairs or just walking on flat surfaces. I just saw an orthopedic surgeon who recommended I go for physical therapy. Has anyone else suffered with these symtons?