When you abuse opiates for many years your opiate receptors physically change.You also stop producing endorphins the little molecules that make us feel happy and kill pain.
So, when you stop using outside opiates your brain doesn't have anything to fill the receptors and you begin to feel depressed ect.
That's why your diet and exercise are very important especially right now.You should also be drinking those sport drinks like gatorade ect, they restore electrolytes in your body and will help with your energy level.If you find you can't take it feeling like this then by all means go to your doctor and get an anti-depressant for a couple of months.Believe me you will feel better but just remember that you didn't get addicted overnight so you won't get better overnight either.You have done a great job at quitting and you should be proud because propoxyphene is an opiate and it is very addictive.Also remember that any opiate that we take we mtabolize it into morphine,so it doesn't matter what opiate your addicted to because it all ends up as morphine in the brain.Good luck to you and way to go on kicking the darvon....Dave:)