Alcohol And Sleep: Why It Harms Rest And What Helps Instead

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Illustration for Alcohol and Sleep: Why It Harms Rest and What Helps Instead: a cup of tea on a bedside table at dusk

Alcohol does not help you sleep. It can make you drowsy for a short time, but it disrupts REM sleep and breaks up the second half of the night. In a review of 27 studies, REM sleep was delayed and shortened even at low doses (Gardiner et al. 2025). Harvard Health calls a bedtime drink a common myth and not a good idea (Harvard Health).

Last updated October 9, 2026

Looking for a calmer evening routine? Start with sleep hygiene 101 or the bedtime calculator.

The Short Version

The NHLBI simply advises avoiding alcoholic drinks before bed (NHLBI). The research explains why, and the rest of this guide shows what the studies found and what to do instead. Alcohol can change how fast you fall asleep, but it leaves you with lighter, more broken sleep and less REM. The safest choice for sleep is not to drink.

A Short Calm, Then A Rough Night

Early in the night, alcohol can shorten the time it takes to fall asleep and make the first half more consolidated. That is the part people notice (Ebrahim et al. 2013). The cost comes later.

As alcohol leaves your blood, sleep gets lighter and more broken. The Sleep Foundation reports more of the lightest sleep stage, more frequent waking and fragmented sleep in the second half of the night (Sleep Foundation). Because you were asleep for much of it, you may not remember the damage. You just wake up feeling less rested.

What Alcohol Does Across the Night A night bar split in two. The early part shows brief drowsiness that fades as the body clears alcohol. The later part shows lighter sleep, more waking, fragmented sleep and less REM, so you wake up less rested. Brief Drowsiness, Then a Broken Night Early Night Later Night Brief drowsinessFeels like it helpsThe effect fades fast Lighter, broken sleepMore wakingLess REM, less restedStress hormone rises hours later Pattern from Sleep Foundation, Harvard Health and a 2013 review.

What Alcohol Does To REM Sleep

The 27-study review found that alcohol delays the start of REM and shortens it, and that REM disruption happened even at low doses and got worse as the dose rose (Gardiner et al. 2025). An earlier review found that total-night REM is generally reduced at moderate and high doses, and that REM onset is delayed at all doses (Ebrahim et al. 2013).

REM matters for dreaming and may help with memory and mood. Read what is REM sleep for the stage itself and how to get more REM sleep for habits that protect it.

Why You Wake Up

Harvard Health says that several hours after a nightcap, alcohol raises the stress hormone epinephrine, which is linked to waking up. It may also increase the need to urinate at night (Harvard Health). If you wake in the early hours, this is likely part of the reason. See why you wake up at 3 AM.

Myth Versus Fact

Alcohol and Sleep: Myth Versus Fact Four rows. Myth: a nightcap helps you sleep. Fact: you may doze off faster, but the second half of the night breaks up. Myth: a small amount does no harm. Fact: REM was disrupted even at a low dose in a review of 27 studies. Myth: alcohol relaxes you so it helps. Fact: it raises a stress hormone hours later. Myth: it treats insomnia. Fact: it may account for about 10 percent of persistent insomnia. Myth Versus Fact A nightcap helps me sleep You may doze off faster, but thesecond half of the night breaks up A small amount does no harm REM was disrupted even at a lowdose in a review of 27 studies It relaxes me, so it must help Hours later it raises a stresshormone linked to waking up It treats my insomnia It may account for about 10 percentof persistent insomnia cases

Snoring And Sleep Apnea

Alcohol relaxes the muscles of the tongue and throat and raises resistance in the nose, which makes pauses in breathing more likely and longer. It also lowers the drive to breathe, and people who have been drinking are harder to wake, so fewer wake-ups end a pause (Sleep Foundation). Harvard Health notes that alcohol can contribute to sleep apnea (Harvard Health).

If you snore or have sleep apnea, alcohol is especially risky. Read our sleep apnea guide and why you snore.

Mixing With Medicines

Using alcohol as a sleep aid can backfire (Sleep Foundation). Mixing it with sleeping pills or sedatives is described as extremely dangerous (Sleep Foundation). If you take any medicine that makes you drowsy, ask a doctor or pharmacist before combining it with anything else.

Who Should Avoid It Completely

The Sleep Foundation names people who snore or have sleep apnea, people with heart conditions, people who take sedatives, and people who are sleep deprived or alcohol-sensitive as groups who should be especially careful (Sleep Foundation). If that is you, talk to your doctor.

Harvard Health says alcohol may account for about 10 percent of cases of persistent insomnia (Harvard Health). In the Sleep Foundation’s data from about 160,000 profiles, nearly 90 percent of regular evening drinkers reported at least one sleep problem (Sleep Foundation). Those are associations, not proof of cause.

Better Ways To Wind Down

Five Calm Ways to Wind Down Five cards. Keep a steady bedtime. Dim the lights and slow down. Keep the room cool, dark and quiet. Watch caffeine and late meals. Talk to a doctor about insomnia, since CBT-I works better than a nightcap. A Calmer Evening, Without the Cost 1Steadybedtime 2Dim lights,slow down 3Cool, dark,quiet room 4Early caffeine,light meals 5Doctor forinsomnia Small steps that work for sleep without side effects.

  • Keep a steady bedtime. A regular schedule does more for sleep than any drink. See sleep regularity.
  • Dim the lights and slow down. A warm shower, a quiet room and a book give calm without the cost.
  • Keep the room cool, dark and quiet. Our ideal sleep environment guide covers it.
  • Watch caffeine and late meals. See how late to eat before bed.
  • Talk to a doctor about insomnia. Treatments such as CBT-I work better and last longer than a nightcap.

A Simple Evening Routine That Works

You do not need anything complicated. A short, repeatable routine helps your body expect sleep. Here is a plan built from health agency advice.

  1. Pick a bedtime and keep it. The CDC advises going to bed and getting up at the same time every day, and adults need 7 or more hours (CDC). The bedtime calculator finds your time.
  2. Stop caffeine early. The Sleep Foundation suggests stopping at least 8 hours before bed (Sleep Foundation). The caffeine impact on sleep calculator helps you set a cutoff.
  3. Finish your last full meal 2 to 4 hours before bed. Most experts suggest this window, and a small, simple snack is fine if you are truly hungry (Sleep Foundation).
  4. Put devices away for at least 30 minutes before bed (CDC).
  5. Do something calm. Take a warm shower, stretch, read or pray quietly, and keep the lights low.

Give it two weeks before judging, and keep the routine on weekends too. Most people notice they fall asleep more easily once the routine is steady, and sleep that starts naturally is deeper than sleep that starts with a sedative.

If Stress Is The Reason

Many people reach for a quick fix at the end of a hard day. If stress or worry keeps you awake, the lasting answers are slower but better. Write down tomorrow’s tasks before bed, talk to someone you trust, and see a doctor if worry or low mood lasts more than a couple of weeks. Our guide on sleep and mental health can help you decide when to get support. Reaching out early is a sign of strength, and many people find that sleep improves once the stress is dealt with directly.

Sleep After Cutting Back

Sleep can feel worse for a while after someone stops drinking. Insomnia is common during withdrawal and early recovery (Sleep Foundation). In an older review, REM rose above its normal level in withdrawal, called REM rebound. In one study of 40 inpatients, 25 percent had insomnia in the first 48 hours, and in another study of 56 patients it lasted about five weeks (Brower 2001).

Heavy drinkers should see a doctor before stopping, because withdrawal can be dangerous (Sleep Foundation). Sleep trouble is also more common in people who have struggled with alcohol. Insomnia rates among people in treatment ranged from 36 to 72 percent, compared with about 10 percent in the general population (Brower 2001). Support is available, and a doctor can help with both the drinking and the sleep.

Helping Someone You Care About

If a family member or friend uses alcohol to sleep, a gentle approach works best. Start with care, not blame. Share that alcohol tends to make sleep worse, and suggest a talk with a doctor about the sleep problem itself. Help with the practical things you can control, such as a calm evening routine and a steady bedtime. For ongoing insomnia, our insomnia guide explains treatments that work.

FAQs About Alcohol And Sleep

Does Alcohol Help You Sleep?

No. It can make you drowsy for a short time, but it disrupts REM and fragments the second half of the night (Ebrahim et al. 2013, Sleep Foundation).

Why Do I Wake Up After Drinking?

As alcohol leaves your blood, sleep gets lighter and more broken, and a stress hormone called epinephrine rises (Sleep Foundation, Harvard Health).

Does Alcohol Affect REM Sleep?

Yes. In a review of 27 studies, REM was delayed and shortened, even at low doses (Gardiner et al. 2025).

Is A Nightcap A Good Sleep Aid?

No. Using alcohol as a sleep aid can backfire, and mixing it with sleeping pills or sedatives is extremely dangerous (Sleep Foundation, Harvard Health).

Does Alcohol Make Sleep Apnea Worse?

It can. It relaxes throat muscles, raises nasal resistance and lowers the drive to breathe, which makes breathing pauses more likely (Sleep Foundation).

How Long Do Sleep Problems Last After Quitting?

It varies. In one older study of 56 patients being treated for alcohol problems, insomnia lasted about five weeks. Heavy drinkers should see a doctor before stopping (Brower 2001, Sleep Foundation).

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