I have been using Vicodin on and off for about 10 years, I dont have any medical need for it. I realize that i have an addiction but dont really want to quit. I have always considered Vicodin as my "get stuff done" drug. It has always been a great "motivator" so to speak. I often take vicodin when I get home from work and need to exercise but don't feel like getting my lazy ass to the gym. I never exceed more than 1/2 or one vicoden ES a day and never on days that I will be drinking alcohol. I probably average about 3-5 vicoden a week and drink one day a week. I realize that this is an addiction but I feel I've never let it get out of control by exceeding my one a day rule. Can using vicodin in this manner cause liver damage?