My first thought would be that the diarrhea is because she's not eating solid food. But she could also have an intestinal virus. Is she still drinking alcohol or unable to? When was the last time she went to a doctor?
You do have to remember to take care of you. She is dying a slow and miserable death. You didn't cause it and you can't cure it. Please remember that.
She's really frail. However, B12 or thiamine shots are standard treatments for alcoholics. Won't do her any harm. I doubt she'll be willing to go every day, although it's only done for a limited period of time.
Yes, it is. Do you think she will be willing to go every day for 5 days? Of course, you are right that it won't do a lot of good when she continues to drink.
Thanks very much for the compliment. I am happy to give info and support anytime I can.