From Wiktionary, the free dictionary
Referring to its stimulant effects.
go pill (plural go pills)
- (informal) Any drug used to promote wakefulness, such as amphetamine.
- Synonym: no-go pill
2013, Barbara Sahakian, Jamie Nicole LaBuzetta, Bad Moves: How decision making goes wrong, and the ethics of smart drugs[1], OUP Oxford, →ISBN:In 2003, modafinil was approved by the United States Department of the Air Force as a ‘Go Pill’ for management of fatigue in certain aircrews.