A 24-year-old male asked:
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 answered
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
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