Pharmacist here with a severe stutter. You want to avoid benzos such as Xanax. While they may be helpful they can lead to dependency and addiction. Your doctor probably won't give it to you anyways. Your best options are buspirion, propranolol, or an SSRI/SNRI. Propanol helps to lower your heart rate and can be useful before presentations or public speaking. Your best bet is probably buspirion and/or an SSRI/SNRI such as Zoloft or celexa. Talk to you doctor what's right what for you. Many people have reported buspirion and a SSRI/SNRI to help. Personally it's what I take, although I can't say it helps much. Let me know if you have questions.