Propranolol
"I took 1 and a quarter of a 10mg Propranolol an hour before my speech and gave a 1.5 hour speech with no issues. I'm 5' 1" 125lbs. I normally have a high heart rate, sweat and have trouble breathing during speeches or interviews. This is a miracle drug that eliminated my performance anxiety. I will definitely start taking this before any presentations in the future."