No and you shouldn't rely on weed or any substance to do something you already know how to do. As someone who uses weed and thought it would help me with my stutter trust me it doesn't. Now I can't speak for everyone but if we use weed or any other drug as a tool for being better communicators we aren't really dealing with the problem at hand. The problem the relationship our mind has created with the stutter. It's a lot more in depth than that but to answer this poll no, substances don't help with stuttering.