I taken myself of wellbutrin and zoloft. I couldn't stand the side affects, nightmares, cold sweats, nausea, impotence, etc etc, plus the withdrawels when you don't have the drug can be hard to go through.
I take omega-3 supplement to make my blood flow more freely and little less work for the heart I suppose. I also take melatonin and valerian root herbs to make me calm also. There are probably more supplements out there, so you might want to research for more.
I'm not saying these will stop panics or anxiety like the prescription psycho pills and might not work on some of you, but atleast they don't have any nasty side affects and it's not addictive and no withdrawel syndromes. Actually, the valerian root and melatonin is supposed to be for sleeping at night, but I'll take it whenever I want to feel more mellowed out a bit. Plus I like them better than sleeping pills.
Again, these aren't made to protect you from anxiety or panic attacks. Heck, give it a try for a week, you never know. :)