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A member asked:

How long are fentanyl metabolites detectable on a urine sample tested specifically for fentanyl?

A doctor has provided 1 answer
Dr. Matt Wachsman answered

Specializes in Internal Medicine

Quite a bit of time: the first thing is that fentanyl is a long acting drug mainly because of the time it takes to get out of the patch and into the person. The time starts hours after the patch is removed. Due to some staying in the skin, it brings the total time to about a week after the patch is rmoved.

Dr Minich agreed

Answered 4/30/2018

2.1k views

Thank

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