pdoc is the person who perscribes your perscription aka psychiatrist. Then you have your T who does all the head work. psychiatrists used to do the head work but have seemed to specialized in the medication area. At least this is my understanding.

As far as your friends all doing it too, often people gravatate to other people who are like them, experiencing the same sort of things. I think it is awesome that you have people with you who are trying to stop doing this thing. You all can support each other in your quest for mental health. They will really understand you when you seek their support.
Carrie