In 2026, Provigil (modafinil) continues to lead as a premier eugeroic—a class of drugs specifically engineered to promote a clean, focused state of wakefulness without the typical "wired" feeling of traditional stimulants. Unlike amphetamines that act like a system-wide adrenaline surge, Provigil functions more like a precision-weighted thermostat for the brain, subtly increasing levels of dopamine and stimulating the hypothalamic orexin system to sustain alertness.