I haven’t tried Shrooms so I can’t tell, but from my experience with Alcohol and Weed, I think it depends on your state of mind. For instance, Alcohol alters your state of mind and gives a strange new confidence. I rarely stutter when I’m drunk because I feel like I can do anything (even if it is completely false). The interesting part is while high on Weed. For me, it depends on two factors: 1- The language I’m using: If it is English ( A language in which I’m not 100% fluent) I tend to stutter more because I have to formulate the sentence in my mind before speaking it, and THC gives me sometimes this “Extra-Anxiety” that I really don’t need at that moment. So when thinking about saying something, THC whispers to me that I must say it fluently, and so I stutter more. This thing don’t really happen in my native tongue when I can be more relaxed and enjoying this moment. 2- The people that you’re with: If smoking with friends or whether people you’re conformable with, I don’t really think about my stutter because I know that nobody will really judge me if I slip and stutter cause everybody is already aware of that and I have good bonds with this people that are beyond the way each of us speak. Unfortunately this isn’t true with strangers due to the fact that people usually judge on impressions. I’m interested through in trying Shrooms or even LSD, just to get new insights about myself. It is always fascinating to see how the human mind and body works.