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A member asked:
I took a urine drug testing for pre employment. about 12 hrs before i took two 50 mg of diphenhydramine sleep aid. is this possible to show up false positive?
A doctor has provided 1 answer
Yes: Diphenhydramine can cause false positive for opiates and others, results will not confirm on GC/MS.
Answered 7/23/2018
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