I found out later and also they put him on two medications for Sundowning.
He had an allergic reaction to one which caused him to itch all over. After getting him home his Dr. and I figured it out and got him off one and he is doing great on the other one. It is right there in the side affects of the one we took him off that itching could be a side affect. Even our Pharm asked why he was on two different ones.