Since Xanax has a half-life of around
12 hours, most users will have the drug out of their systems after
4 days. Urine tests can detect Xanax for up to
5-7 days after the last use. Saliva tests can detect Xanax for up to
2.5 days after the last use. Blood tests can detect Xanax for up to
1-6 days after the last use.
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