Dad has always had a little confusion, been diagnosed with mild vascular dementia. Month ago I was home and witnessed what I thought was a bad case of sundowners. A very specific delusion that he obsesses on, and I spent the night exploring the house to keep him calm by helping explore problems that he was imagining in the functioning and safety of the house. The next couple days he was fine, I asked him at some point if he still believed the delusion and he sheepishly said no. Apparently he has been picking up the delusion more and more each day and two days ago he has become extremely agitated and upset about it. Mostly he is upset that he can't convince us it's true. When we find holes in his logic (the doctor offered to check ... and you said no) then he changes the story. I don't think he is imagining anything that will cause us harm except perhaps accidentally, but he persists in thinking he is somewhere else (in a hospital) in a dangerous environment and forces anyone he sees to sit and experience it with him, getting more and more threatening when they try to leave. No one in the house can have any peace and his energy level is non-stop. He broke character just before he went to bed last night, realized he was home and thanked his caregiver. This morning he awoke worse than ever. He is taking lots of valium that helps briefly, then not. We always suspected he is bipolar and the delusion isn't as upsetting as the energy level and the strength he exhibits and we are afraid he will hurt himself somehow. He's in the ER awaiting a checkover, he seems perfectly normal there, but it's been a 4 hour wait and now they need dinner and medicine and when suggested they go home and try again tomorrow, his delusion surfaced and he insisted if he went home, the dangers would be there waiting for him. I feel that he's always had strange ideas, but it is the energy with which he forces it on others is a mania, and I am hoping they treat it as a chemical or physical problem and not just write it off to dementia. You find yourself wishing you could give him a shot to just knock him out hoping he'll get over it in a bit. Anybody know if this is normal dementia behavior? Did I mention that if you disprove his theory, he changes it? It seems he has a need to keep himself upset because he can't save the world, he needs a problem to save us from. He has PTSD and I think it might tie in with that, feelings of lack of self-worth perhaps. He hates being dependent and he is not involved in the running of the household, and I think that might be the trigger. I've decided I've found a home where they care for memory and ALZ but wonder if they will take him even if we can't calm him down. Thinking we'll get him calm and he'll have chemicals to control his problem, like many people who have a mental illness, hopefully as long as it is under control he can still find AL.