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A member asked:
I have a patient that intermittently has a low reading for norfentanyl with no explanation. no street drug use in over 30 days...
A doctor has provided 1 answer
Metabolite: Norfentanyl is a metabolite of fentanyl. The only way to test positive for it is it has been exposure to the medication. Fentanyl comes in many presentations including patches, lollipops and IV solutions.
Answered 4/27/2021
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