U.S. doctors online nowAsk doctors free
NY
A female asked:

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

1 doctor answer1 doctor weighed in
Dr. Clarence Grim
Endocrinology 57 years experience
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.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated May 11, 2017

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.