In answer to your questions....YES
I had a blood test three years ago when I started to take them, never had one for the Liver since then. Do you think I should organise one? I've obviously had cholesterol blood tests, but nothing else.
Genneraly if you no muscle pain problems they have you take a liver test every three months to make sure everything is fine. Different statins work differently on different people. You may have to try different ones. They do work.