boy, this is a bit of a delicate subject, i feel like i need to walk carefully here! there is a famous clip you can find on youtube of paul stamets, a mushroom expert, talking about how a trip on mushrooms cured his severe stutter. i took psychedelics, along with other drugs, when i was a teenager. generally, drug use makes my stutter worse. now that i am an old fart, this includes a bit too much coffee or one drink too many can make my hangover and speech more apprehensive. i think that, if you look at the trajectory of my life, my speech has generally improved, and i can now go into situations that i would have freaked out at a few years ago. that being said, i am still a stutterer and i am 99% sure i always will be. there was a stuttertalk podcast with fred murray where he talked about working on your stuttering is like a big ship that you can slowly change the course of over years and years but you can't expect a miracle overnight. so, i don't know, i didn't experience a eureka moment or waking up without a stutter after having taken psychedelics. at least for me, i think continuing to put myself out there, practicing on my speech at home with course sheets on various sounds and difficult sounds, and trying to be fearless to desensitize myself, that has probably made the biggest improvement. actually, a big thing is just realizing that people probably don't care as much as i myself care when i stutter. i will also say though that, as you said, getting a little more relaxed and not being so uptight tends to help as well and that can be achieved in a variety of ways -- i actually find that meditation and introspection has been a positive force in that regard.