Lorazepam
"One day, while I was waiting for the train to take me home from gym, I started to feel my upper torso muscles progressively stiff.

A few seconds after the train closed its doors, it became much more intense and I started to panic. My heart started to beat very fast for short periods of time and I could not breath properly. Also, my arms and face felt funny, I really thought I was going to have a heart attack and die in there.

Thankfully, I made it home and I went to the city hospital in the afternoon. I had my heart checked with very positive results, and my doctor prescribed me these 1 mg pills. They've helped me abort a few panic attacks in the last weeks even taking half a pill, with no noticeable side effects"