I got the muscle aches on Lipitor. My Dr said about 10% of her patients do. They weren't horrible - just weird little aches and pains in places that you never had them.
I am now on Zetia. No adverse affects from it at all - I will soon go in for a re-test to see how it is doing on lowering my Cholesterol. I was at around 250 and the Lipitor got me to 200.