What happens to a person who has been snorting vicodin for a year?

Well, Considering that vicodin isn't meant to be snorted, who knows. Something that will happen despite whether you take it how you should or not would be it killing your liver. You can survive on between a half and a third - assuming that much of the liver is healthy. That doesn't mean you WANT to kill it... Oh and like I said, that's with the assumption you have a healthy liver and you don't even want me to explain the meanings of a healthy one. Chances are, you don't.