There is an extended release version of propanolol that I take and it last for 10-12 hrs, so it is great at keeping those SA physical symptoms at bay almost all day long. This also eliminates the need to plan for when you need to take like you do with the regular version of it. I find propanolol, in general, stops most of those quick bursts of anxiety symptoms that you can get, which could be considered panic like symptoms. Those quick bursts usually start me down a bad long term anxiety path and if I can stop those then I am usually not crippled so bad from an anxiety producing event (i.e. I recover much faster). Like others have said, it doesn't stop the negative thoughts, but this in combination with a benzo has really helped me better control my SA.
If anyone has figured out the meaning of life, please enlighten me.