Modafinil is a wakefulness-promoting medication commonly prescribed to treat narcolepsy, shift work sleep disorder, and fatigue related to obstructive sleep apnea. Unlike traditional stimulants, modafinil enhances alertness and cognitive function with a lower risk of jitteriness or dependency. It works by stimulating specific neurotransmitters in the brain that regulate wakefulness, making it an effective solution for individuals who struggle with excessive daytime sleepiness.