I was writing out a massive success story here since I'm PUMPED, but deleted it and figured the solution waas simple enough to keep it short and sweet. 

I'm 29, had anxiety, panic attacks and depersonalization which started a couple years ago. Literally couldn't walk outside sometimes because of the thought of human interaction. Had to have my anxiety meds before hopping on planes or in a car, around people etc.. So yeah I was taking meds frequently. 

I tried working out (running 5x a week) which helped, but didn't get rid of them 100%

Stopped what I thought was casual drinking and boom, my anxiety was gone. I was so used to having a bloody mary one night, a beer or two the next, an old fashioned the next, and considered it casual drinking in my mind. Nope, I guess it was too much. I'm sure this is pretty obvious for most people but figured I would share this success story since I wouldn't wish anxiety, panic attacks or depersonalization on my worst enemy.

Good luck! Hope this helps someone out there.