In fact, as researchers are starting to do meta-analysis which roll up almost 200,000 participants in multiple
trials do not show any long term damage or reactions. In fact, statins users are still protected from their use for up to 5 years after stopping their use.
Here's an interesting article about a study, the Heart Protection Study 2, which tracked the long term effect of statin use on over 20,000 participants, it's a great read.
http://www.medscape.