Just a little advice from someone who's suffered with PTSD and panic attacks for most of my adult life. Spent years on Lexapro, Paxil, Wellbutrin, Xanax, etc etc. All these beta blockers and narcotics do is mask the issue while adding equally bad side effects to the mix.
Behavior Therapy, joining a PTSD group, carnivore diet, no drugs/alcohol/caffeine, plenty of sex, and focusing the mind like reading books or the Church all helped me more than any doctor. The drugs will just make you fat, unhealthy, depressed, and suicidal.
Good luck dude and feel free to ask any questions if you're so inclined.