The chemical structure is: Lisdexamfetamine dimesylate is a white to off-white powder that is soluble in water (792 mg/mL). VYVANSE capsules contain 10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, and 70 mg of lisdexamfetamine dimesylate.Inactive ingredients: microcrystalline cellulose, croscarmellose sodium, and magnesium stearate.NS stimulants (amphetamines and methylphenidate-containing products), including VYVANSE, have a high potential for abuse and dependence. Assess the risk of abuse prior to prescribing and monitor for signs of abuse and dependence while on therapy [see WARNINGS AND PRECAUTIONS, and Drug Abuse and Dependence].