Adderall is a medication that is used to treat attention deficit hyperactivity disorder (ADHD). It is a central nervous system stimulant that works by increasing the levels of dopamine and norepinephrine in the brain. Adderall is available in both tablet and capsule form and is usually taken once or twice a day. The recommended dose for children with ADHD is 5-10 mg per day, while the recommended dose for adults with ADHD is 10-20 mg per day. Adderall can be addictive, so it is important to take it as prescribed by your doctor. You should not buy Adderall online without a prescription from a licensed pharmacy.