At this point you have to take care of yourself, first. Sounds selfish (because our mothers taught us that?) but it isn't.
I agree with others about having her MD "adjust" her medication. Usually our lives come back to cheer or haunt us as we become aged and alone. Don't take the full responsibility of her. She's an adult, give her options (as she may not really know or remember them) let her choose and let her live with her decisions.

My mother (85) just totalled her car Monday (June 6th) it was her fault in essence, since she rear ended another car.. pulling into turn lane on wet streets... could have happened to any of us. I couldn't fix the situation for her. (She's ok, btw, even though her seatbelt failed, no airbag, she's just bruised.)

The insurance company can't let her have her car to repair. In FL, once a car is listed as totalled, it can't be driven on street again, has to be sold for parts. She doesn't really have the money to buy a new car, AND pay for the increased insurance premiums if she continued to drive. She HAS to pay the tickets.. oh.. which reminds me to get back on track here: a year ago she and I had one of our very few true "arguments" over her car registration. She insisted she wasn't confused and took care of it. Well, turns out, she didn't and one of her tickets was for unregistered car! She has to live with this, I'm not taking care of it for her. She wanted to drive, she needed to do what was necessary.

Can you find ways to view what your mother is trying to force upon you in this same way? You get to make your own decisions about life. Yes, we have to honor our parents, but we do not have to raise them.

Take care. You aren't alone in taking care of aging parents. (There's a book out for this btw, I tried utilizing some of the things in the book but my mother rebelled. I ended up giving HER the book! LOL)

TC