If you think alcohol will help you sleep. It actually reduces the amount of time your body spends in REM sleep. Leading you to feel more tired.
A drink before bedtime may make it easier to fall asleep given the depressant effects that alcohol has on the CNS, but a booze-filled snoozing session will quickly become disturbed. REM sleep happens about 90 minutes after we fall asleep. It's the stage of sleep when people are dreaming. Disruptions in REM sleep may cause daytime drowsiness, reduced concentration and actually give you the feeling of jet lag. This will make you feel less rested and actually more tired!