Yes I just started taking ADHD meds and I have noticed my stutter is worse. But being able to focus on task > stuttering less. The amount of talking I do has NOT changed at all. My psychiatrist also warned me that it’s a dice roll. She has patients that see their stutter improve but she also has patients that their stutter worsens. There’s so much of the human brain that we don’t know . Who the heck knows why it affects different people differently.