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    How Long Will IV Fentanyl Stay In Your System? When Does It Become Safe To Do A Urine Screen?

    asked 2 years ago

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    Fentanyl has a half life of seven hours (average, within a range of 3-12 hours dependent on biological processes), and is excreted via urine, so I imagine that you'll be fine by the next day.

    answered 1 year ago   

    hey buddy i don't no who told u that fentanyl leaves ur system that fast but it's a lie it stays in ur system for about 3 to 5 days depending on the amount taken i know this for a fact cause i take a drug test about 50 to 100 times a year

    comment made by Caputo00 5 months ago    Report

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