In the U.S. military and other uses, a no-go pill refers to a hypnotic medication taken to ensure adequate rest in preparation for upcoming tasks or for rest and recovery. As of November 2012, medications approved as no-go pills by the U.S. Air Force for Special Operations include: * Temazepam (Restoril), with a 12-hour restriction on subsequent flight operation * Zaleplon (Sonata), with a 4-hour restriction on subsequent flight operation * Zolpidem (Ambien), with a 6-hour restriction on subsequent flight operation