Adderall (amphetamine and dextroamphetamine) is a stimulant used to overcome ADHD and narcolepsy. But it affects the brain directly, thus affecting the central nervous system. such as: An increase in heart rate and blood flow in the body, High blood pressure, Increase in the amount of glucose released into the body, etc. Overdosage of any kind of drug is harmful to the patient or any normal human.