Jet lag and shift work disorder are circadian rhythm sleep disorders which result in sleepiness and can elevate injury risk.

时差及轮班工作障碍属于昼夜节律睡眠障碍者，因而造成思睡感且提高受伤风险。

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And when sleeping pills aren't enough to help patients stay alert, a wakefulness drug called Provigil is already approved for excessive daytime sleepiness caused by narcolepsy, sleep apnea and shift-work sleep disorder--the exhaustion brought on in some people by working the night shift.

FORBES: Sleep On Demand