The problem is that there's still a significant number of people who are trying to capitalize on your way of thinking: That it's all in your head and simply talking about it can fix you. These are the Depak Chopras and Scientologists of the world. They use metaphysics and pseudoscience to reinforce your way of thinking. So your average web search on the terms "depression and addiction" will bring up a whole lot of opportunistic crap that isn't actual medical documentation.

A quick scan of these pages seems to indicate that they are medically-based rather than metaphysically-based. Anyone have any better links?