In the U.S. military, go pills and no-go pills refers to stimulant medications meant to increase wakefulness and hypnotic medications taken to ensure adequate rest in preparation for upcoming tasks.
As of November 2012, medications approved as no-go pills by the U.S. Air Force for aircrew and AFSOC[1] forces include: In contrast to the sleeping agents, a go pill refers to a wakefulness-promoting agent used for fatigue management, especially in a military combat-readiness context; this is contrasted with a no-go pill, which is used to promote sleep in support of combat operations.
A go pill generally contains one of the following drugs: