I've had long standing back problems. to make a long story short. I was taking vicoden for long time, found myself very depressed and angry, at everyone and everything. Thought it was bad depression, (I do suffer from). Anyways, I've stopped the vicoden, and now on Percocet and Nuerontin, and Ibuprofen. My mood has changed. I seem not to be so depressed, etc. I am happy once again, I go out of the house, do more with family, husband, friends, etc.