I think that my father is going through Vicodin Withdrawl. The laws have changed, and now the doctors won't give him Vicodin, even though there is nothing they can do to help his pain. He has been really short tempered and fidgets a lot. He always seems to be looking for an escae route, because he has been getting in fights with members of the family. What are other signs of Vicodin Withdrawl, how long will this take?