For me, it has all but gone away. I'm not 100% willing to say that I will NEVER have problems again, but...I don't see how it could possibly affect me in any real way again.
Medicine has helped (I still take 15mg of celexa per day), but the real reason for long term success is that I have been able to overcome the FEAR of anxiety. I'd be willing to bet that the overwhelming majority of people who deal with panic disorder deal with one major issue: FEAR of their own panic. We all have situations and scenarios where we say we are afraid, but what we really fear is the panic itself. The person who is confined to their home doesn't actually fear danger on the outside. They are afraid of having a panic attack on the outside. I went through a period where I couldn't work, eat, or sleep because I thought I was losing my mind. I was petrified about lapsing into depression, becoming suicidal, being in a state of panic forever. I was utterly afraid of the panic itself. I think that's our biggest problem.
Well, after several months of journaling, rational thinking about anxiety, analyzing what exactly panic was and what was prompting it, excercises to diffuse panic...I have been basically panic free for about 5 months. Just 3 weeks ago, I sat and watched a close relative take his last breaths after a bout with aggressive cancer. I literally watched him die. A part of me was worried that I would regress back into panic disorder...but I didn't. I cried and grieved just like anyone would. I even got the image of him taking those last breaths caught in my mind for a few days after...but no panic.
It's about getting over that fear. I no longer view panic as a threat. I think that's the key. I feel for people who go for awhile without experiencing panic and then, boom, it hits them a second or third time around. I have to wonder just exactly what these folks have done to truly get to where they don't actually FEAR the panic itself. Getting to that point will get you over this crap...for good.