Although Lipitor (for high cholesterol) has many nasty side effects, I feel your mother-in-law may have toxic heavy metal inher body which could be causing her strange behavior, anxiety attacks, and unwillingness to go out. Tell her to stop the Lipitor for at least a month and see if she improves. If she is willing, have a little hair sample tested at a lab for toxic metals and then try the natural flushing techniques which are safe to use. I think it is prudent for older folks to be tested for toxic heavy metals because it is found in so many products and even in our tap water. I wish we had known this before my mother-in-law had to go to a nursing home because of dementia years ago. She died there, and had gotten so bad she didn't even know her family members any more. Very sad. Don't wait. Good luck. Jax in Colorado