Propranolol
"I have suffered from panic attacks since the age of 13. My doctor prescribed propranolol on an as needed basis for this and it helped tremendously. I usually have severe periods of Irritable Bowel Syndrome during my panic attacks, which can lead to having to use the restroom over 10 times a day. It's painful, makes eating impossible, is embarrassing, and is huge nuisance to deal with in public. Propranolol completely eradicates the physical manifestations of my panic attacks. The IBS is eliminated, I don't cry excessively, I don't get extremely hot or cold, I can breathe normally, and I am able to rationally address the problem at hand."