Modafinil, sold under the brand name Provigil among others, is a central nervous system (CNS) stimulant and eugeroic (wakefulness promoter) medication used primarily to treat narcolepsy,[3][7][14] a sleep disorder characterized by excessive daytime sleepiness and sudden sleep attacks.[15] Modafinil is also approved for stimulating wakefulness in people with sleep apnea and shift work sleep disorder.[3] It is taken by mouth.[3][7] Modafinil is not approved by the US Food and Drug Administration (FDA) for use in people under 17 years old.[7]
Modafinil is the drug that the movie 📝Limitless (2011) was based upon.