A member asked:

Will metronidazole show up in a lab urine drug test. i was told it has methyl in it therefore it's shows up in a lab drug test for amphetamines??

A doctor has provided 1 answer

Unlikely: Haven't seen reports of metronidazole (Flagyl) causing false positive drug screens for amphetamine or methamphetamine. That said, there are some prescription and some over-the-counter drugs that do sometimes cause false positive drug screens.

Answered 10/27/2020

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