Adderall 20mg is a prescription medication that combines amphetamine and dextroamphetamine. It's widely used to treat Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. Adderall works by altering certain chemicals in the brain to increase focus, control impulses, and improve attention. However, it comes with potential side effects such as insomnia, dry mouth, and the risk of dependency, so it's essential to use it as prescribed.