Do people with dementia have real up and downs. My MIL was barely functional from Jan- March this year and not sure if meds had anything to do with it but she popped out of it. She barely moved or ate. She is in AL and has dementia. She kept saying she was dying or wanted to die. She has started again with this behavior this week. Can alcohol have anything to do with it. She goes up and down with how much she drinks. She buys her own alcohol we will not get it for her. It is easy for her to get. This time it could be depression apparently she won't go for lunch because somebody told her she stinks.