Modafinil has emerged as the crown prince of smart drugs, that seductive group of pharmaceutical friends that promise enhanced memory, motivation, and an unrelenting ability to focus, all for hours at a time.
Doctors prescribe modafinil, sold under the brand name Provigil, to improve wakefulness in adults who are experiencing excessive sleepiness as a result of obstructive sleep apnea, shift work sleep disorder, or narcolepsy.