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Hello, this is Dr. David. I am reviewing your question now and will be with you momentarily.
false negative or false positive for what substance?
do you have the result of your hair follicle testing?
so your urine test was positive for methamphetamines?
Ephedrine. Xenadrine RFA-1 contains 25 mg of Ephedra alkaloids in the form of ma huang
which can cause false positive for amphetamines or methamphetamines on urine screening tests.
but confirmatory MS/CG tests should be negative if you don't use amphetamines.
they should do confirmatory tests with any hair screening tests.
yes, using ephedrine can cause false positive for emphetamines.
is a medical article about it.
because the Xenadrine can cause false positive
you need to get a lawyer to help you clear this up.
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