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How many focalin would you have to do to show positive for amphetamine?
Wiki User
∙ 13y ago
I'm not sure about Adderall specifically, but any methamphetamine, usually ("key-word" usually) has a cut-off (and this is a generalized answer, because there may be variances for each type of drug screen on the market)...1000 ng/mL (nanogram/millilitre).
Wiki User
∙ 16y ago
Wiki User
∙ 13y agoFocalin (dexmethylphenidate) is NOT an amphetamine and will not show up positive regardless of the amount taken.
There have been incidences of Focalin causing false positives for amphetamine however confirmation testing, GC-MS, will definitively indicate what the substance is.
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