My stutter gets more prominent when my anxiety is higher. Originally I was on Zoloft and saw no affect on really anything. Then I recently got on Guanfacine. I’m seeing a noticeable decrease in anxiety and my stutter. Could be the placebo effect considering it’s been around a month. But it’s definitely not gone but it is decreased. Only downside is it lowers your blood pressure so you have to be careful and pay attention to your body.