This Dopamine relation to stuttering needs to stop. It's been debunked among alot of people. SOME seems to do well with neuroleptics etc and dopamine reduction stuff but imo it's a minority. If I pop 70mg of Vyvanse or other amps, believe me, I get much more fluent and confident. The CRASH tho makes me almost MUTE. I can't speak at all when my dopamine feels depleted.