Incredible Can Aderal Amd Xanax Show On Urine Home Test Ideas. Factors that can affect how long. I have to take a drug test (urine) later today (thursday) in a couple hours.

On average, it will stay in urine for one to two days after your last dose. Although most benzodiazepines show up in standard urine tests, some don't. When you first take xanax, it will take about 12 hours before it shows up in your system.