Impact (positive or negative) from different drugs/medications on your speech?

Impact (positive or negative) from different drugs/medications on your speech? i'm just sharing my experiences and asking for yours out of curiosity. i am not trying to encourage anyone to use drugs to deal with your issues as it is only a temporary solution and will most likely make your problems worse in the long run. anyway i have been a stutterer ever since i could talk and my stutter is usually in the form of bad blocks and prolongations of sounds/words. i have my bad days where i block for up to 5 seconds on almost every few words in a sentence (even around those i'm close to and comfortable with) and i have my good days where i stutter a bit less. as a young adult i lightly experimented with a handful of different drugs like amphetamines (dextroamphetamine aka dexedrine), couple different opiates like vicodin and codeine, alcohol, benzodiazepines such as xanax and ativan, cannabis, and MDMA. stimulants and opiates didn't have much of an effect either way on my speech whilst weed actually made it worse more often than not. benzos and alcohol slightly improved it by making it physically easier get thru blocks but more so they just made me more confident and not care about anything. MDMA was the only drug that totally eliminated my stutter while under it's influence. the one and only time i tried it 2 years ago i took 150mg together with 3 of my good friends and i experienced complete fluency. besides all the emotional/mental bliss and physical goodness of the drug, it was one of the most profound experiences of my life due to being able to speak and express myself so freely and with such ease for the 3 hours or so that it's effect lasted. the only scenario i can think of to compare my experience to is maybe a paralyzed man walking for the first time in years. my stutter did return back to "normal" the next day though. i'm not a pharmacologist or anything so i'm not really sure how it benefited me in the way that it did but it was pretty interesting and it would be cool if something like could be studied. thoughts/experiences?