my side affects from statins (Lipitor) have been muscle pain in m...

my side affects from statins (Lipitor) have been muscle pain in my legs and back. I also get aches in my knees and elbow joints. When I stop taking Lipitor, the aches dimish. After 4 weeks they are almost gone. If i go back on lipitor, even as little as 5mg, the side affects gradually reappear. i also take Zetia, it seems to have no side effects. the good news is my total cholesterol has dropped from 160 to 104 and my LDL is now 46. I also drink and eat a lot of soy products and take 1000mg of niacine a day. Before Lipitor, I used Pravacol and had similar side effects. I will know in another 4-8 weeks if the light headedness i have had for the last 4 years goes away.