I've been on vicodin for awhile now do to a really bad car accident and serveral surgurys. About 2 weeks ago I realized that I no longer had any pain so I stopped taking them. Now I feel I really just want to take them because not being on it is making me feel like crap. I was wondering how long the process takes? Is it different for everyone? Just trying to figure out how long im going to have to deal with this.