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A member asked:
Can someone taking morphine test positive for fentanyl although they have never taken fentanyl?
A doctor has provided 1 answer
It is possible: Both drugs in the same class (opioids) so they will both show up the same. Fentanyl is a synthetic opioid and much stronger than morphine. When testing for Morphine, it will show positive for morphine metabolites or fentanyl. Take care.
Answered 10/21/2020
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