I agree totally with Owen on the cleansing. Start with the Bowel Cleanse then move onto liver cleansing. I won't suggest which one is best because different things work for different people. There are forums for both here on CZ.
I've found since I've started cleansing, taking mega-doses of Vit C and improving my diet (I still slip up on the diet from time to time) I've lost weight, and improved energy levels dramatically. Recently I also was diagnosed as having a fungal overgrowth (candida) by my naturopath. Since I started cleansing that out as well, the improvements in my health and general well-being have been fantastic.
I think you'll find if you start cleansing your need for the drugs will slowly disappear.