Alcohol is a central nervous system depressant that causes brain activity to slow down. Alcohol has sedative effects that can induce feelings of relaxation and sleepiness2, but the consumption of alcohol – especially in excess – has been linked to poor sleep quality and duration. Drinking alcohol before bed can add to the suppression of REM sleep during the first two cycles. Since alcohol is a sedative, sleep onset is often shorter for drinkers and some fall into a deep sleep rather quickly. As the night progresses, this can create an imbalance between slow-wave sleep and REM sleep, resulting in less of the latter and more of the former. This decreases overall sleep quality, which can result in shorter sleep duration and more sleep disruptions.
Medications for sleeping problems such as Ambien (zolpidem), Lunesta (eszopiclone), Sominex (diphenhydramine, Unisom (doxylamine) when mixed with alcohol can results in drowsiness, slowed or difficulty breathing, impaired motor control, and memory problems.
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