stimulants (aside from maybe mdma) will most likely worsen your anxiety. So will weed, at least in my experience. I have heard caffeine can trigger panic attacks in people with panic disorder, so maybe staying away from that would help. The benzodiazepines (xanax, valium) will almost definitely reduce your anxiety/panic. I took a whole bunch of Klonopin one day, and stumbled around nyc in an apathetic daze. Even had a run-in with a cop in the subway, which would normally freak me out a bit, as i have a cop phobia. I didn't give a shit what he was telling me.

As for alcohol, for me it reduces anxiety considerably, but I've also heard something about alcohol triggering feelings of panic. Trent Reznor of NIN has said in recent interviews that when he was drinking heavily, he would often have severe panic attacks. Does anyone have any more info on why this would be? It doesn't yet make sense to me.

You might also want to consider cognative behavioral therapy to deal with your stress/anxiety issues. I'm going through it now for social anxiety and depression and it's helping immensely. But hang in there. Panic attacks suck, i know. Believe me, I've been there. Take care.

G