Buying Adderall online without a prescription in the USA is illegal and highly discouraged due to the risks involved. Adderall, a prescription medication used primarily to treat ADHD and narcolepsy, is classified as a Schedule II controlled substance due to its potential for abuse, addiction, and serious side effects. It works by increasing the levels of dopamine and norepinephrine in the brain, improving focus, attention, and impulse control in individuals with ADHD.