I have taken shrooms a few times and while it does not cure a stutter directly, I can help tackle the triggers that initiate your stutter to begin with. It can help greatly with social anxiety which unfortunately a lost of us have because of your stutter. I've found that the lower my axiety is the smoother conversations are for me. Shrooms have also help with my view on people in a way that I cant explain, but I think it has helped reduce any stuttering.