I read the information you submitted to MedHelp. I too have been on Lipitore after having a stent put in. Prior to my stent I was very active and physical. After being on statins - I tried Zocor, Crestor, and Lipitore. I had horrible aching legs on Lipitore and sharp pains running in my knee and ankle - then an elevated number of Alkaline in my liver blood-work. I too have experienced an unexplained knee injury. My doctor took me off Lipitore and wants me to try Welchol but so far my Health Provider won't cover it. I haven't been the same since my stent and sometimes wonder if I'll ever have quality life again!