Benzos like Xanax can show up in urine a long time (if that is what you mean by "in your system") sometimes as long as 30 days to 6 weeks. It doesnt act on your body that long but it can be detected in a drug test a long time. I personally had one dose of Xanax taken before a dental appt show up on a urine drug screen 6 weeks after the dose was taken. The half life is 12 to 15 hours for immediate release pills.
- Xanax Information for Consumers
- Xanax Information for Healthcare Professionals (includes dosage details)
- Side Effects of Xanax (detailed)
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