TOUGH love although I wonder which side it’s tougher on. Please know we are praying for you and Matt.
And as far as his upline telling him to stop his meds, I wonder what the law would have to say about someone practicing medicine without a license. The next thing is to prove it.
But you don’t want to put it in those terms to him. If you do (“You come to Mommy, but you’ll take her money,”) then it makes it harder for him to come to you for help when he hits bottom.
Oh, and make sure he does not see a pattern of you saying, “I told you so.” You want to make it easy for him to come to you when it falls apart.