A member asked:

I am a 21 year old female about 5,5 102 lbs. 4 years ago i was about 5'4 97-100 lbs and i took for the first and last time 3, 50mlg vyvance in abt 8-10 hours. horrible next two days but i lived. question: do i need to worry about long term effects???

A doctor has provided 1 answer
Dr. Terrence Bethea answered

Specializes in Psychiatry

Best stimulant featu: In single dose studies, Vyvanse did not cause any long-term side effects even at 250mg. Vyvanse (lisdexamfetamine) is a pro-drug. The med you take is inactive and should have little or no effect on you until it gets into your blood. Enzymes from red blood cells activate the med. Prodrug levels peak around 90min and active levels peak by 6hrs. It's all gone from your body by 48hrs.

Answered 7/22/2017

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Thank

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