Amphetamine is a stimulant class that increases dopamine/norepinephrine, used for ADHD and narcolepsy. Adderall (amphetamine-dextroamphetamine) is a branded mixture of amphetamine salts providing a balanced effect. Adderall is a specific formulation of amphetamine, often longer-acting depending on IR/XR versions. Both improve focus and alertness but may cause appetite loss, insomnia, and a risk. Choice depends on formulation, dosing, and medical supervision. Both require a prescription and careful monitoring for safety concerns always.