A behaviour therapist in the area has made simply stated, amazing progress with Austic children using less than conventional methods.
The main technique he used was in-house, all day LSD/Mushroom trips, depending on how trapped in their own mind the child was.
The net result, was during the trip, each child was basically in awe with the surrounding, intently focused outwards on the objects that were once familiar. And generally a ot more calm and quiet during. And as the day wore on, and ended. The child was talked to, kept calm, music playing.
This led to every one of the patients having an amazing transformation. (I'm sure that they intentionally omitted mentioning any children that didn'th ave an amazing transformation)
One kid actually started to put in a very, very concerted effort concentrating trying to speak words and to verbally communicate.
Others were much calmer and generally easier to integrate into day-to-day living.
Sure they were all still outside the band of "normal", but they all made unbelieveably progress towards it, that the parents are universally thinking it's a miracle.
All this said,
LSD was used for those who were semi-responsive to the outside world. (more common cases)
Mushrooms were used for those who were not in tune with their bodies (immobile, lots of flailing, etc;)
The sessions were done in the childs home, with parents around, calming classical music playing and just watching and idly interacting with the child. But otherwise letting the child calmly work thruogh the experience.
The first session had the psychiatrist around to guide the child, calmingly talk to the child, and to help the parents who haven't had experinecs with said substances, understand what was going on, and what to expect.
This definitely isn't a "drug up your kids and let them have a trip" lots of effort went into ensuring it was a good trip for teh child, and to allow the child to start to mentally focus on the external world.