Nicotine
(gwern.net)
In 201114ya, I became curious about nicotine gum/patches as a possible alternative stimulant to modafinil: its much shorter half-life makes it more useful for evenings or scenarios like needing a quick alert on a long drive.
In 201114ya, I became curious about nicotine gum/patches as a possible alternative stimulant to modafinil: its much shorter half-life makes it more useful for evenings or scenarios like needing a quick alert on a long drive.