Xanax is a prescription tablet. Mostly in the case of anxiety disorder. The elimination rate of a drug is different in every person. Even if a drug is eliminated entirely from the body a small amount of Xanax does remain in the blood for two days or more by taking even a single pill. People who take Xanax on a regular basis can maintain a higher level of medicine in the bloodstream. It takes several weeks to get rid of Xanax from the body completely. It can be excreted from urine, and blood entirely. Remember that every drug test sensitivities vary and may detect even a low level of Xanax in urine.