I think my friend might have fried his brain doing MDMA 8 days in a row

So basically let me elaborate on this.

We (a few of us) went on a 3 day bender at a festival with quite a few drugs, MD being the main choice. Anyway, after the festival this one guy did not stop doing drugs, mainly mdma, cocaine and weed. And he continued doing INSANE doses. Im talking upwards of 600mg a day excluding redoses. He also did not sleep for this whole time.

I should add that about 2 weeks before this festival, he did a lot of mdma then too.

Fast forward a month, he is gone absolutely crazy. Doing insane things. He has this sense of grandeur and thinks that he is a very important and rich person in society and is just very very delusional and out of touch with reality, I mean he walks around with a bulletproof vest. He still doesn’t sleep. He posts the most bizarre things on social media.

Dunno what to do. Is he fucked up forever? Or will his brain recover.

Edit: I should also add that he has quite a history with cocaine abuse and sporadic benzo abuse