As one decides between Concerta and Adderall, there is an element of fitting a medication into daily life. Concerta gives one a smooth delivery throughout the day, useful for continuous focus. Adderall provides an immediate release that might give faster relief to the more severe symptoms. Concerta and Adderall are both associated with sleep problems and a decreased appetite; in addition, Concerta is more likely to cause stomach pain. There are some differences between them, such as how long they can last, but they can both help people with attention deficit hyperactivity disorder (ADHD) or narcolepsy.