the was a rage for prescribing statins a few years back, but it's mostly died away.
When I was on them, I started getting upper arms pains several months later. The locum I saw said "I bet you're on statins", and took me off them again. No problem with my cholesterol levels since. In fact when the locum looked back in my files, there never had been any problem, so I don't know what they were for in the first place.
One possible downside is occasionally you take out insurance where one of the questions asked is "Have you ever been prescribed statins?" I usually have to ring the insurers up and explain that I was, apparently incorrectly, and my cholesterol levels are fine. This is tedious.