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1.
The drug Zolpidem. Has a sedative (sleep-inducing) effect when taken. Used by Air Force operators to help them calm down after taking stimulants to stay awake during long missions. The opposite of a go-pill.

Also used before a mission to calm nerves and promote sleep.
After flying for 120 hours nonstop, having taken many go-pills in the process, the pilots required a no-go pill to help them sleep.
by icedoverfire November 11, 2009

Words related to No-go pill

go-pill awake depressant sleep stimulant