Armodafinil is a wakefulness-promoting agent that acts as a central nervous system stimulant. It is chemically and pharmacologically unrelated to other CNS stimulants, such as methylphenidate and amphetamine. Armodafinil is FDA approved to increase wakefulness in patients with excessive sleepiness due to narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It has not be studied in menopause-associated fatigue.