A member asked:

For what length of time will 30 mg of vyvanse (lisdexamfetamine) stay in my system for?

A doctor has provided 1 answer
Dr. Patrick Tapia answered

Specializes in Psychiatry

UDS versus serum: If you are talking about a urine drug screen, it would classically last about one to three days. If you are talking about how long it would continue to exert a psychiatric effect then that would be about five to twelve hours depending on the individual. Stay safe!

Answered 8/14/2015

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