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A member asked:
I took 4 50mg xr vyvanse (lisdexamfetamine) over a 30 day period. will the metabolites in my hair be high enough to fail a 90 day drug screening?
A doctor has provided 1 answer
Yes, you will fail: Best to be honest up front. Vyvanse (lisdexamfetamine) is metabolized to dextroamphetamine. It is detectible in a standard hair test for ninety days of growth, or about 1.5 inches of hair.
Answered 10/19/2013
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