Just a heads up, unlike stimulants you have to titrate on and off the non stims, and withdrawals can be nasty. I’m not sure if I’d recommend them if you’re only looking to help with stuttering. But if you really want to try, I personally recommend either Intuniv or Qelbree. Qelbree is my favorite personally with the least amount of sides and improved my speech at higher doses (>300 mg). Intuniv is also good but might be sedating if not paired with some other kind of stimulant. I don’t recommend Strattera due to it’s nasty side effects, and Welbutrin (though technically an NDRI) I’ve heard worsens stuttering in a lot of cases.