I was on rosuvastatin (10mg) for years with no noticeable side effects up until just recently when I had a minor elevation in ALT, whereupon my GP recommended discontinuing, and my subsequent hepatic panel was back within normal range. I actually had a small hope that maybe the drug was contributing to my fatigue and muscle aches and so forth, but I have seen absolutely zero change in my symptoms since I stopped, so I am pretty confident the drug wasn't an issue for me as far as ME/CFS is concerned.