Vicodin can't be forced out of the system by sheer volume of drinking; it's absorbed into other parts of your body besides your intestinal tract. Vicodin is comprised of hydrocodone and acetaminophen and has half-life of about 4 hours, depending on the dosage. That means that after about 8 hours, you'll still have about a quarter of the original levels of hydrocodone/acetaminophen in your blood. Acetaminophen can appear in urine tests up to 24 hours after administration, so I imagine that there's not much you can do about your situation.
But please, don't try drinking massive amounts of water. You could severely damage your body by unbalancing electrolytes. There was something in the news a while back about a woman who died because she got into a water-drinking contest for a Wii, or an iPod or something.
But please, don't try drinking massive amounts of water. You could severely damage your body by unbalancing electrolytes. There was something in the news a while back about a woman who died because she got into a water-drinking contest for a Wii, or an iPod or something.