She was placed on a statin drug. Sometime after that, she could barely walk or sit up and had pain in her neck and shoulders.
She was, uncharacteristically, in bed the entire time that my brother next visited, and he and I discussed getting her a hospital bed so that she could sit upright. One of her doctors ordered scans and x-rays to rule out a fracture or some other damage but none was found.
One night I saw a commercial for a statin drug that mentioned "talking to the doctor" if muscle pains resulted from taking the drug.
I stopped giving my mother statins and she slowly regained her strength. The pains are gone.
I recently talked to my doctor about taking CoQ10 (not related to statins), and he said that he often recommended it for patients who got muscle pains from statins. The CoQ10 eliminated the muscle pain, and allowed the patient to continue with statins.
It's worth a try, but I'm not sure I would bother trying with someone who has already managed to get to 90 without a lot of drugs.