Armodafinil is a central nervous system stimulant primarily prescribed to manage excessive daytime sleepiness associated with narcolepsy, obstructive sleep apnea, and shift work sleep disorder. This medication promotes wakefulness by boosting the levels of monoamines like dopamine and norepinephrine in the brain, thereby helping individuals stay alert and focused during waking hours. Although its exact mechanism is not fully understood, it is often given to patients whose routines or medical conditions interfere with normal sleep-wake cycles. Armodafinil is also used off-label for conditions such as ADHD, chronic fatigue syndrome, and major depressive disorder, where improved attention and reduction in fatigue are needed. Its benefits include enhanced alertness and cognitive function, making it valuable for those whose daily activities are affected by unmanageable sleepiness.