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All these help to flush drugs out faster. Xanax is a relatively short-acting drug when compared to Valium. If you're an average-size person, you would expect Xanax to stay in your urine for 1-4 days after last use. To be safe, you should wait at least a week. Note that this is very dependent on how much and for how long you've been taking it.
On average, Xanax has an elimination half-life of 9-16 hours. This means that it takes a healthy personâs body this amount of time to get rid of half of a dose of the drug. Therefore, most people will have the substance out of their systems after 4 days. There are a number of factors that can alter the rate that Xanax leaves the body. The tests used to detect Xanax in a personâs system are blood tests, urine tests, saliva swabs, and hair follicle analysis. Urine tests are the most commonly used, but the length of time that Xanax stays in this bodily fluid depends largely on how heavy abuse of the drug has been. For occasional users, a urine test will usually not work past 4 days, but in heavy users, it can detect the substance for up to a week.