Past. >> stuff would come up that i haven't thought of since they happened to old memories that you hadn't even remembered came back to you i felt a lot of shame and embarrassment throughout one of the sessions about my drinking and how bad i felt for my parents to put up with all this. he took psilocybin in 2016. he says he hasn't had a drink since. >> do you ever have a de where you wake up and you're like, man, i wish i could have a vodka right now or never. not at all. not at all. which is the craziest thing because that was my favorite thing to do. >> i want you to lie back. but the i shade on headphones and let the music carrie, you now using psychedelic drugs and therapy is not new. there were hundreds of scientific studies done on a similar compound, lsd in the 1950s and 60s. >> it was it's tested on more than 40,000 people. salman controlled therapeutic settings