A member asked:

I take a hair focile test for dfs. it keeps coming back positive for meth. i tried meth twice 2 years ago.how do i keep coming up positive?

A doctor has provided 1 answer
Dr. James Burns answered

Specializes in Emergency Medicine

This is one: of the issues with hair testing that makes it difficult to interpret accurately. If your hair is long it would be contained towards the ends of the strands and would continue to be positive indefinitely unless you had a significantly shorter haircut.

Answered 6/18/2014

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Thank

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