The chemical structure
Lisdexamfetamine is used primarily as a treatment for attention deficit hyperactivity disorder (ADHD) and binge eating disorder; it has similar off-label uses as those of other pharmaceutical amphetamines. Lisdexamfetamine itself is inactive and acts as a prodrug to dextroamphetamine upon cleavage of the lysine portion of the molecule. 3.2.1 Pharmacology. Vyvanse ™ (lisdexamfetamine dimesylate) is a prodrug of d-amphetamine. After oral administration, Vyvanse ™ is converted to d-amphetamine, the compound responsible for the drug's therapeutic activity in the treatment of ADHD; and L-lysine, a naturally occurring essential amino acid. 3.3.1 Pharmacodynamics. Vyvanse ™ (lisdexamfetamine dimesylate), is a prodrug of d-amphetamine. After oral administration, Vyvanse ™ is converted to d-amphetamine, the compound responsible for the drug's therapeutic activity. Adderall is a brand name of amphetamine salts-based medication used for attention deficit hyperactivity disorder and narcolepsy, legal only in the United States and Canada. Vyvanse is a brand name of Lisdexamfetamine used to treat attention deficit hyperactivity disorder, legal only in the United States and Canada. Both Adderall and Vyvanse increase the amount of dopamine and norepinephrine between synapses in the brain, which is useful for several medical conditions. Adderall, which is used to treat ADHD and narcolepsy, is also sometimes prescribed for depression, obesity, and sleep cycle disorders. Lisdexamfetamine can be prescribed for the treatment of attention deficit hyperactivity disorder (ADHD) in children aged 6 and up as well as adults – as a part of a treatment program that may include other measures (i.e., psychological, educational, social). Lisdexamfetamine itself is inactive and acts as a prodrug to dextroamphetamine upon cleavage of the lysine portion of the molecule. Lisdexamfetamine is used to treat attention deficit hyperactivity disorder (ADHD) as part of a total treatment plan, including psychological, social, and other treatments. It may help to increase the ability to pay attention, stay focused, and stop fidgeting.  30mg Vyvanse capsules. Lisdexamfetamine (contracted from L-lysine-dextroamphetamine) is a central nervous system (CNS) stimulant and dextroamphetamine prodrug of the phenethylamine class and amphetamine class that is used in the treatment of attention deficit hyperactivity disorder (ADHD) and binge eating disorder. Lisdexamfetamine itself is inactive and acts as a prodrug to dextroamphetamine upon cleavage of the lysine portion of the molecule. 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. 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. CNS 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]. Vyvanse comes in the form of a capsule that is usually taken once a day in the morning. Advertisement. Vyvanse™ (lisdexamfetamine dimesylate) is a prescription medication that is used for the treatment of attention deficit hyperactivity disorder (ADHD) in children age 6 to 12 years old, adolescents, and adults. 
https://en.wikipedia.org/wiki/Lisdexamfetamine http://www.hc-sc.gc.ca/dhp-mps/prodpharma/sbd-smd/drug-med/sbd_smd_2010_vyvanse_120534-eng.php http://www.diffen.com/difference/Adderall_vs_Vyvanse https://en.wikipedia.org/wiki/Lisdexamfetamine http://www.webmd.com/drugs/2/drug-148324/vyvanse-oral/details https://en.wikipedia.org/wiki/Lisdexamfetamine http://www.healthyplace.com/other-info/psychiatric-medications/lisdexamfetamine-dimesylate-brand-name-vyvanse/ http://www.rxlist.com/vyvanse-drug.htm http://adhd.emedtv.com/vyvanse/vyvanse.html
what is the structure of vyvanse