Lisdexamfetamine is a drug used to address symptoms of hyperactivity in patients. Lisdexamfetamine is typically taken for individuals who have trouble concentrating. Lisdexamfetamine requires a prescription and is not available in generic form. This medication works by altering the balance of chemicals in the brain to decrease hyperactivity and restlessness in children and adults with ADHD. There is only one brand of lisdexamfetamine brand available on the market today. Check with your doctor or the product package for the correct dosage as it may differ from brand to brand.