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A member asked:
I failed a hair test for cocaine but i have been 16mts clean could it be amoxicillin or novacaine?
A doctor has provided 1 answer
Drug test: No, it isn't some confounder. By your admission, you are a Cocaine user. A hair test checks metabolites from months in the past. That is why the federal government uses it.
Answered 6/24/2014
5.1k views
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