A member asked:

I had a positive toxicology for norfentanyl. i have never used fentanyl or norfentanyl. i am prescribed suboxone, gabapentin, concerta and klonopin (i?

A doctor has provided 1 answer
Dr. Clarence Grim answered

Specializes in Endocrinology

Test for norfentanyl: Discuss cross reactivity in the meds you take with the method that was used to test you. Suspect some cross react. Discuss with person ordering testing as they know the exact method used.

Answered 5/11/2017

700 views

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