What in vyvanse (lisdexamfetamine) makes the brain function?

Vyvanse (lisdexamfetamine): Vyvanse (lisdexamfetamine) is an amphetamine that causes an increase in Dopamine and nor epinephrin levels in the brain. Dopamine is necessary for focused attention and concentration. It also is responsible for feelings of satisfaction and happiness. Nor epinephrin is brain Adrenalin and serves to enhance brain alertness.