www.drugs.com/medical-answers/ritalin-vs-vyvanse-3020197/
..., Metadate, Quillichew ER and Qullivant XR. Vyvanse is a brand (trade) name for lisdexamfetamine (LDX). LDX is a prodrug of dextroamphetamine, which means it needs to be absorbed by the body and come into contact with red blood cells before it is converted into dextroamphetamine, its active form...