we know that for some people increasing dopamine in the brain improves stuttering and for some it has no impact or makes it worse. In addition to dopamine and norepinephrine, nicotine stimulates acetylcholine receptors. So there are a lot of variables here that might help or hurt based on your particular stuttering profile. You'd just have to try it. All these comments slamming nicotine as bad for you are quite uninformed. Cigarettes are terrible for you, but not because of the nicotine. Also smoking, vaping or snus deliver too much nicotine too quickly for the slow-release therapeutic effect you'd be looking for to curb stuttering. The safest and smoothest way to get nicotine is to try the lowest-dose patch (it's also the least addictive delivery method). The Nootropics sub might be helpful to you for tips on brands you could get on amazon even, or how you might even try cutting a larger patch into a small sliver for a very low dose to try it out.