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It would only show up if you have used it.

Because meth is a derivative of amphetamines such as suddifed, ADHD medication and others amphetamines is the main ingredient of meth. you would actually test positive for amphetamines and meth would show. and depending on levels etc...and other crap they determinate it to be meth or other.

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2012-12-24 09:33:39
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Q: Why would methamphetamine show up on drug test?
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