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Binge Eating Disorder: Effectively curbs compulsive eating by regulating impulse control. Smooth Action: Designed for gradual, sustained release to avoid spikes and crashes. How Vyvanse Works Vyvanse is a prodrug, meaning it is inactive until metabolized by the body. This mechanism ensures a steady release of its active ingredient, dextroamphetamine, which increases dopamine and norepinephrine levels in the brain, promoting focus and reducing hyperactivity.