Are you Buying Adderall online? You can get your order in the fastest way. Adderall is a prescription medication that contains two drugs: amphetamine and dextroamphetamine. It’s most commonly used to treat attention deficit hyperactivity disorder (ADHD). It’s also used to treat narcolepsy. Headache is one of the most common side effects of Adderall. It works by increasing the amount of dopamine and norepinephrine in the brain. Dopamine helps the brain reinforce rewarding behaviors.