I'll just say I haven't had speech therapy in 15 years, but I did recently go to a speech center to see what was new in the stuttering world, and the approach that's gaining a lot of traction is Avoidance Reduction Therapy for Stuttering (ARTS).     Let's be real here-- growing up with a stutter was not easy, and I know that I quickly found tons of ways to try to avoid it happening. Substituting words, pretending I lost my train of thought, not finishing a conversation, or not speaking because I "knew" I wouldn't be able to get it out, and all these avoidance techniques started around ~8.  Hell, my stutter isn't even "bad", around 8% disfluency. But think about it, learning all of those avoidance techniques over your entire life is inherently anxiety inducing. If it wasn't, then they wouldn't be used as an escape mechanism. ARTS is based on acceptance, especially considering the "tips and tricks" of speech therapy (for me personally) just made things worse. Either I spoke so slowly and sounded completely monotone and drab, or I had to overthink everything which made speaking feel even more like a chore. I've tried medications in the past and nothing even remotely helped. I think the only thing that might possibly help other than fully accepting disfluency and just riding that wave is a medical device (I only know about Speech Easy). Stuttering in general is such a small part of the worlds population and it doesn't have any "negative" effects (other than psychological) that there is almost no funding (outside of SOME pediatric therapy), so I wouldn't hold out hope on medications.