I'm in the same boat with my step son. Maybe not the exact but very similar. He overdosed on meth back in March and narrowly survived with a traumatic brain injury if it wasn't for his mom finding him in the nick of time to perform cpr on him until the medics arrived.
During his first month being kept in a sedated state in icu had a profound effect on me that nothing to this day has had on me, not even losing my dad to alcoholism. Then the following five months of rehab watching him relearn how to do pretty much everything does something to someone who's held firm with trying to get the help he had always needed since this is not his first rodeo with overdosing.
When he first overdosed I brought up dmt with his mom with not much further interest. He's known of my fascination with ayahuasca after seeing me reading some Peter Gorman.
When he was in rehab he drew a hard line at a point against some of the drugs they were giving him to help with the recovery process which strikes me a odd that he flipped towards the end with wanting to start vaping nicotine then cannabis towards the last month.
All he wants to do with me is smoke a fat joint but I can't bring it to myself yet as his mom took him to the dispensary for his first dose. As a grower and leading up to all this, he and his mom put it on me hard to start supplying him with weed but I had a strong feeling he was turning around and bartering it for his doc. I let his mom know that it world mean more to me for us to run our first mile together rather than smoke a joint. I feel like he needs oxygen to his brain more and to make gains to becoming independent before I can comfortably sit and smoke with him. I feel like I love him more than anyone in his life to want that for him. I'm so much more than weed