How Long Does Fentanyl Stay in Urine? Drug Testing Information
Fentanyl traces are detected through urine, hair, saliva, and blood tests. Fentanyl is detectable in urine within 1 to 2 hours after the dose and the traces last for up to 24 to 72 hours. In blood tests, fentanyl is detectable easily within a few minutes after use and the remaining traces stay for almost …
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