Several factors are involved, I believe - inc. switching his antidepressant (paxil) from AM to PM. He hadn't really been talking much and was sleeping ALL of the time. He was having accidents and sitting in it... He was falling daily or even multiple times daily. There was no forward thinking - just comments and thoughts on food, TV and sleep. He was very confused and cloudy.
Currently, he is wearing his watch (! - hadn't worn it for 2 years) and bugging me about replacing the watch band (!). He is using his pedal exerciser several times a week. He has a female friend/housemate for whom he asked me to buy cookies (and then told me she was diabetic! LOL). He is socializing at the dinner table. He even planned a week ahead and consulted me about a restaurant to choose for their weekend lunch outing (<that was huge for me!). I invited him over for dinner and he razzed me about bringing home take out vs home-cooking a full meal (<he taught me how to cook, interestingly).
He, at one point months ago, alerted me to the 'one-celled organisms' living under his (dirty) fingernail - but the general and more frequent hallucinations have subsided like the woman sitting on the couch or the bedbugs.... His cataracts, I'm starting to think, may have contributed so some of the mis-interpreted hallucinations tho they may be also due to the disease....
He still picks his nose and inspects the findings ... he's done that since he moved down here but it may be due to the Flomax causing runny nose.... And he is picking at a bump on his face a lot but I do that, so who knows about that one...
A lot of 'little' things have perked up.... He still has his moments - like it seemed he forgot to get out of the car the other day when we got home. He said something bizarre the other day but then said he realized that didn't make sense... so there was an awareness there. He also razzed me for wearing the same pants twice in one week... Oh and he is taking interest and responsibility in changing his undergarments now!! His caretakers came up with an ingenious solution to constantly changing pullups - they line a pullup with a pad and just change the pads until the under pullup needs changing.
Oh, and we just weaned him off Sinemet - WITH NO CHANGE - so it seems he is parkinsonism vs formal parkinsons

. We meet his neuro on Nov 3 and I suspect she will not reinstate it. She has also mentioned adding Namenda and may do that when we see her next. The staff at his place think he is better without the Sinemet but I just don't see that much change.... He is walking better but I think that is mostly due to more exercise in general.