Shit I forgot antipsychotic medication. They block dopamine - olanzapine = cured my stutter but has brain fog and gained 15 lbs - risperidone = no effect but some people do. No side effects Check out this cool article on the science behind stuttering and potential medications. Show this to your psychiatrist https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7118465/