I suffered from panic attacks throughout my 20's. Recently I went to a cognitive behavioral therapist who guided me through a hyperventilation technique to simulate the physical symptoms of a panic attack. The results are amazing: practicing this technique three or so times a week for a month completely rid me of panic attacks. I recently was feeling stressed about a work trip and "tuned up" the night before by going through a session and had no issues.

The therapist said this cures 99% of patients. The "golden feather" in a CBT therapist's hat.

The technique:

Sitting down, as rapidly as you can, take a deep breath in and blow it out. Do this 40 times. Blow out all your air and hold your breath for as long as you can (1 - 2 minutes for me, stop when you start to get convulsions or you may pass out). During this time observe your tingling hands, light headed feeling, sweaty palms etc. This is a normal result of an excess of oxygen in your body. It cannot hurt you. Now take a deep breath and hold it for 15-20 seconds. Start immediately and repeat two more times for a total of three. Repeat three times a week for a month. If you start to feel panic more often, start your treatment again (this is rarely necessary).

The first time will be the scariest. After that it gets MUCH easier I promise. It may be helpful to see a CBT therapist to talk you through it the first time. It will change your life.

That technique coupled with a mild anti anxiety medication has completely feed me of anxiety and panic.

I hope this helps others :)