Another thing you might want to look into are adaptogens.
I also had panic attacks and went through and intense period of stress. These helped me. Also diet is something you have to look at if you cut out caffiene you will see your panic attacks drop.
http://en.wikipedia.org/wiki/Adaptogen
http://www.naturalelixir.com/stresscontrol.html
I take holy basil
I am also a chemist that works in a pharmaceutical company. I dont have much faith in the drugs put on the market. There is a healthier and better way.