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Fentanyl

Interpretation

  • The presence of fentanyl or norfentanyl >LOQ indicates exposure to fentanyl within 3 days.

Metabolites

  • Fentanyl is metabolized primarily by oxidative N-dealkylation to norfentanyl.

    Fentanyl Norfentanyl

Approximate Detection Times

Fentanyl LOQ (ng/mL) Detection Time* up to
     Fentanyl
0.2
3 days
     Norfentanyl
1.0
3 days
*These are approximate detection times for the drug or metabolites in urine. The actual detection time depends on dose, frequency of use, and individual metabolism.


Key