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A member asked:
Took a drug test 40 hours after taking the 30 mg vyvanse (lisdexamfetamine). what are the chances that it will comes back clean?
A doctor has provided 1 answer
Pharmacology: Vyvanse (lisdexamfetamine) has a half life of approx. 10-14 hours and it takes 4 half-lives for the drug to be eliminated from the body. Vyvanse (lisdexamfetamine) can technically stay in your system for approx. 56 hours.
Answered 6/9/2018
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