I also suffered from side effects of statins. I was prepared to put up with muscle pain which set in within months of starting to take them, but then my appetite completely disappeared. I felt empty but not hungry. I complained about this for about two years to my GP, other doctors at the same surgery and every time I was at the hospital clinic. It became difficult to eat enough carbohydrate to balance my insulin. At the same time I began to have short term memory problems and lost the ability to think clearly. At first, I put all this down to getting older. My GP wanted to put me on anti-depressants when I went to the surgery in desperation. ( My husband told me afterwards that my personality changed as well. ) I put all this down to getting older. Finally, I was made redundant.
A few weeks later I read a letter in a Diabetes UK magazine by a professor of History who had found himself unable to do his job within days of starting to take statins. I stopped the tablets. After a fortnight, my appetite was back. My memory took longer to recover. I don't think it was completely right for a year or more.
The really devestating thing about statins is that doctors do not recognise the side effects, even those that are well-known. Try putting 'side effects of statins' into the NHS Choices website. It lists memory problems, but since reasoning depends on memory I reckon that is compromised as well. Mine certainly was. Trying to identify a problem and argue with HCPs when your memory is not working properly puts you at a real disadvantage. I wouldn't suggest anyone should take them, but some evidently can without apparent ill-effects. You need to make up your own mind and research this yourself.