Drink lots of water, stay hydrated.
My father in law had dementia, that eventually went to full Alzheimer’s. I was amazed at what a bottle of water would do for him.
He had a bout, was hospitalized and a Gerontologist told us he was dehydrated and to make sure he drank water.
Problem was, he did not like drinking water cause then he’d have to pee, so he just carried a bottle, but would not drink it. Next thing you know, he running around in his underwear, and not know who we were.
We’d give him a bottle of water and 15 minutes later he was normal.