Here is a site (www.buyelta.com) I think might be of Interest. I have personally used this product in the past and have had some success with it. The coal Tar ratio is very strong at 10%, if you can live with psoriasis, you can live with the odor, actually...come to think of it, it wasn't that bad.
I also read that stress reduction can be very beneficial to (p) sufferers. Calm down!!!