Haven't had a cigarette for at least seven years now but when I gave them the flick I didn't have DP/DR so I can't help you. But I did have a cigar around xmas time and 30 mins later I had an anxiety attack - must have been the nicotine seeping into my blood stream from the inside of my mouth (I never draw back a cigar) and it was the worst feeling, racing heart, head pressure etc., so if you ask me I think it could only help with lowering anxiety levels. If you don't do it for yourself, do it for others. There is nothing worse than entering the lift first thing in the morning and smelling the putrid smoke odour when smoker steps in and I can almost guarantee they'll be over weight, holding a bacon roll in one hand and a can of coke in the other - hmmmm, great way to start the morning. My advice, quit the ****, it's a filthy habit. It can only help.