Nov 7, - However, Valium's typical half life in a young, healthy person is about 24 hours. . Benzos (valium, ativan, xanax etc) will stay in your system for about 4 hey i took 2 valiums that where 5mg i was just wondering how long Missing: red. Dec 7, - Xanax is a drug that is used to treat anxiety and panic disorders. the same family that includes diazepam (Valium), clonazepam (Klonopin), . or excessive anxiety and worry about two or more life circumstances, for a period of 6 . dysfunction, including ginkgo biloba, horny goat weed, and red ginseng. On average, experts define the half life of Xanax at 12 hours. Hey, I have a friend that takes Valium and xanax too often for no reason just to get that 5 mg xanax almost 2 weeks ago and that was the first time in like 3 years id taken any, Missing: red.