One of Virginia's top worker's compensation attorneys, Michele Lewane, has a recent blog article that answers a question that we often get in our office. (Since we don't handle worker's compensation cases we often refer callers to Michele for accurate answers.)
Lewane says that "generally speaking, you are still going to be entitled to benefits. There are certain exceptions such as drug use, which may prevent you from collecting for your injury."
Michele has authored the book on Worker's Compensation in Virginia and you can get it here. She calls it a "survival guide" and I agree.