A member asked:

My aunt is currently on urine drug screens and she used someone elses clean urine mixed with a few drops of her own dirty urine. will it show on a lab test? or will it make the drug metabolites below the cutoff level?

A doctor has provided 1 answer
Dr. Silviu Pasniciuc answered

Specializes in Internal Medicine

Not enough: Depending on actual volumes used and threshold for the test it can turn either negative or positive. You should inform tester if you know for sure that she is replacing her urine with somebody else's.

Answered 1/21/2021

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