There are probably millions of people in the US every year who drink a glass of wine or other alcoholic beverage just before bedtime. Reasons can include being able to sleep faster, or for red wine’s health benefits. Here’s a recent study that only repeats what’s already known about in sleep medicine for years: That alcohol can make you go into deep sleep faster, but later on, it cuts into your REM sleep, increasing the chances that you’ll have apneas or sleepwalk. The reason for this is that alcohol relaxes your throat muscles, so it’ll make you more prone to obstruction and arousals.
I disagree with the authors to moderate alcohol just before bedtime. I think everyone should stop any sort of alcohol (and food) within 3-4 hours of bedtime. Even if you don’t have sleep apnea, do you want to begin having apneas at night?