Adderall is a combination of amphetamine and dextroamphetamine. These two active substances act to increase the natural chemical of focus in the brain. And increase the levels of norepinephrine, and dopamine to reduce impulsivity. It takes 30 minutes to 1 hour to start working. And take approximately 12 hours to stay in a human body. Buying Adderall onlinein 24 hours with free shipment up to 50% off.