My mother, who is showing signs of dementia, starts drinking hard liquor around 3 in the afternoon and drinks heavily until around 8-9. She throws a fit about things that need doing but mostly about her money. She thinks someone is taking her money (but no one is). She stays on the phone with anyone who will pick up the line and we are starting to get complaints. She gets so bad she can not walk or stand and can hardly talk.
The problem is...she is an alcoholic...she will not stop. Its also possible that instead of having traditional dementia, that she has alcohol induced dementia. You should attend some Al-anon meetings. They will teach you to detach, as you cannot control or change someone that drinks (of any age). The best you can do is wait until she has fallen, call 911 and have her taken to the hospital. You caould also have her Baker Acted which would require a 72 hour psych hold and will start the detox process. After 72 hours, she can check herself out though. She has to choose to do a full detox...and likely she will not.
Please detach. Don't enable her. Don't help her to get alcohol or to keep drinking. This is the only way she will reach rock bottom and ask for help.
Angel
I read that stopping cold turkey might be harmful thus your Mom would need to be under a doctor's care, possibly a rehab to help monitor her condition.