I don't have experience with ADHD meds but I started an SSRI and during the initial 3 months my stutter got worse. Then the doctor (incorrectly) upped my dosage and the stutter was still bad. Now after 7 months on the right dose, it has really helped me to take my stutter to almost not noticable. Still have speech blocks but I can eliminate them so fast now. So sorry to hear about your experience so far. Hopefully it will subside with time.