Im really sorry MM. I have no experience with this.
If I were you I would reaearch AD's like crazy in children. I know there is a black box warning on all AD's for children and youth, actually it's for under 24 or 25 years old. I was given prozac at 17 and it was the worst thing I have ever experienced med wise by far, I would even say the worst I have ever experienced Bipolar wise as well. I became extremely suicidal and psychotic, I literally carved my theigh up trying to get something out of it, could see boxes in my room with people climbing out of them.. It got very scary and crazy very fast. I still have to try and explain those scars to people who see them, and the whole thing is I have never been a self injurer so it wasn't that. I tried AD's as an adult and they made me manic yes, psychosis yes... but not even close to that experience. Way too many kids become very suicidal, homocidal, psychotic... on AD's which is why they come with a strong warning. Not trying to scare you but that is a huge concern.
Maybe a hospital stay is best right now, so he can be monitored closely especially if AD's are prescribed. Is there one where he could get more intensive therapy as well as more skills to deal with this stuff?
I am not saying don't do the AD's but saying if you do go that route use extreme caution.
I hope his pdoc comes up with some good ways to work with him and you. Let us know how it goes. Again I am sorry

, I know this has to be so hard for you all.