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You are doing the right things for him. The loss of his wife has likely pushed him further down the road in his dementia. Seeing a psychiatrist for a diagnosis for possible depression makes a lot of sense. Paranoia (the human waste being sprayed toward him) wouldn't be unusual with dementia but could also be caused by meds he's already taking. Same with the nerve symptoms (wet floors). A psychiatrist educated in different types of dementia should be able to sort through these things, but be very aware of any new drugs, changed drugs, etc. Medications are wonderful, but sometimes they cause side effects that end up being treated by other drugs.   It's good that his doctor is cautious about his blood pressure meds, but your dad may be taking others medications, as well. Everything he's taking should be looked at by the psychiatrist, and it also wouldn't hurt to have a pharmacist go over his meds.   Carol