Yeah it's dose dependent, tried 75mg once which noticeably lowered my stutter and I had an uplifted mood for the whole day, and the other time I took 150mg which gave me body-melting euphoria and such high relaxation that I barely even stuttered.. As good as it sounds, though, it's a hard drug and is not sustainable to take for stuttering long term. I don't even think it impacts the root cause of the stutter, just relaxes you so much that you talk slower and easier I took this drug for other purposes and didn't even know about this effect beforehand