A 24-year-old male asked:
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would .5 milligrams of xanax (alprazolam) taken on a friday evening show up on a urine test on the following tuesday morning? i have never taken it before.

2 doctor answers
Dr. Prem Gupta
48 years experience neurology
Takes about 3 days: Half life in a healthy person is about 11 hours. It takes 5 half lives for near full elimination. So 2 1/2 days later it is likely to be negative in urine.
Answered on Oct 24, 2015
Dr. Linda Callaghan
53 years experience Addiction Medicine
No.: If you had not taken anymore Xanax (alprazolam) after the Friday evening dose, it should not show up in your urine.
Answered on Dec 6, 2016

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Benzos and UAs: Xanax (alprazolam) and it's cousins can show up in uas for up to six weeks or longer. There is no way to quickly clear this any other way.
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Show evidence: It probably will show but you should tell them you took it and show your prescription bottle with the instructions.
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