For what it's worth, I remember the first few days in the psych ward as being quite a shock to my sensibilities.
I listened to all these "sick" and "pitiful" people wearing the same hospital gown as I wore and thought, "I do NOT belong here; these people are NUTS".
After a day or two more, I began hearing others say things that I'd said, talking about things that I'd done, telling about experiences that I could relate to. It was then that I allowed for the "possibility" that I could perhaps be helped if I'd open up and participate honestly. So I did. And that is when I stepped out of my self-imposed prison of despair.
Do express your concerns to his medical team though! You have insight that will help them help him!
For I know the plans I have made for you. Plans to give you a future and a hope. Jeremiah 29:11