Tough on Drugs

Scientists at the University of Cambridge have discovered why some individuals may be predisposed to drug addiction and believe it may lead to better treatments for this brain disorder.

Posted on Mon, 05 Mar 2007 00:00:00 EST at http://www.sciencedaily.com/releases/200...082810.htm

I have never heard of darkening around the eyes being caused by hydrocodone and Tylenol but I know that taking a narcotic can disturb your normal sleep stages which may make you look tired and have the dark circles and red eyes.To be on the safe side,have another person look at your eyes closely and also check under your tongue.If there is any distinct orange color in the whites of the eyes, under the tongue, or the color of your skin, you could be one of the people who doesn't tolerate an ingredient in the Vicodin.