I have given several speeches in my life with no fear until one day I had a panic attack come up and bite me. This took place in an auditorium setting. I have been overcome by anxiety thinking about this. However, I don't have problems in a classroom setting, tv interviews, radio interviews. More or less it is when I am the "expert" in a bigger setting. I have not taken propranolol for a speaking engagement before. Can anyone help ease the anxiety and let me know that it will work?