The liver pathology is separate and distinct from the muscle pathology.
A drug handbook said at 6 - 12 weeks for 6 months, then periodically.
Yep, but the muscles ache due to the bloodstream accumulating toxins the impaired liver either dumps into the bloodstream or can no longer filter out.
At least that's my understanding.
"Doc, it hurts when I do this (take statins)."
"Well, don't do that!"