My husband was on these, and lots of other statins to try to find one that didn't cause him side effects. He had terrible muscle pain and very severe stomach cramps and was taken off them as an emergency . He had blood checks this past week and was found to have a slightly raised cholesterol , but when the Dr. rang him he was advised about diet and told never to go back on statins. There are other drugs you can take instead of statins.  My friend was put on statins(the one you are asking about) and was fine to start with on a small dose, but they doubled it and she suffered terrible pains. She has had to come off it too. I would go back to your Dr. And try another one . Barbara