Can you fail a pre employment urine test if you have a prescription for Xanax and are taking it?

While Xanax can be tested for, it generally is not part of the standard lab testing package unless your PO is specifically concerned about that drug in particular or if the terms of your parole dictate that you should not be taking it. Because they are prescribed to such a large number of people for stress and anxiety to be taken for extended periods of time, benzodiazepines such as Xanax, Valium, Ativan, etc, are generally not tested for.