Definition of "modafinil" [modafinil]

• A stimulant often used in the treatment of various sleep disorders, having the chemical formula C15H15NO2S (noun)

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• "* Recent articles suggest that modafinil is the new drug of choice for studies lately."
• "The seduction of modafinil is that you can feel as peppy after six hours sleep as you would after nine."
• "Provigil, also called modafinil, had sales of $1 billion last year, accounting for nearly half of Cephalon's revenue."