I took statins for only a few weeks and I have an intermittent pain in my leg muscle which is not going away some weeks after stopping taking it - sometimes I feel that I am dragging that leg, and that part of my leg feels colder than the matching bit on the other side. If it was a persistent pain I'd suspect thrombosis, but it isn't that. My memory has deteriorated most annoyingly - but the brain is made of cholesterol, so something which reduces it seems bound to cause problems. I stopped taking the statin and the Metformin too when I lost the car in the supermarket car park just before Christmas, and bought everything twice as well.
If I start to take statins again the Devil will be skating to work that morning.