Proceed with caution when drinking before bedtime, as alcohol may be affecting your sleep more than you realize. This alcohol and sleep may be especially true if you drink alcohol to help you fall asleep faster, and then experience disrupted sleep later in the night without realizing it. Since even small amounts of alcohol can affect your sleep, the overwhelming consensus in the medical community is that alcohol is not an appropriate sleep aid. It takes on average one hour to digest one alcoholic beverage, so stop drinking at least three hours before bed.

Allow Your Body Time to Process the Alcohol

The impact of alcohol on your sleep can run over to the next day in the form of grogginess and a low mood— leading to the commonly known feeling of being “hungover.” Alcohol is known to reduce REM sleep resulting in grogginess, daytime fatigue, irritability and mental fog. REM (rapid eye movement) is the part of your sleep cycle that is essential for memory consolidation, emotional processing and creativity. Additionally, alcohol is also a diuretic meaning more bathroom breaks, plus dehydration, which results in less time to catch up on the recommended hours of rest. While you’ll likely feel that you’re falling asleep faster, you may then spend the later part of your night tossing and turning. Using alcohol to sleep is a more common practice than you think but it’s also a false economy.

That’s because alcohol interferes with the ability to stay asleep and to get high-quality, deep sleep. Circadian rhythms affect how the body responds to alcohol, depending on the timing of alcohol intake. Long-established research shows the body metabolizes alcohol differently at different times of day. Studies have shown the body is more effective at processing alcohol at certain times of the day than others. That’s because alcohol functions as a muscle relaxant which can cause your airway to be more relaxed or floppy.

Properly Schedule When to Drink

For most people, alcohol induces a deeper-than-usual sleep in the first half of the night, followed by disrupted sleep in the second half of the night. If you think your drinking may be impeding your sleep or overall quality of life, speaking to your doctor or therapist is a great first step. So while cutting out drinking will likely benefit your sleep, there may be other factors affecting your shuteye. Even though a glass or two may help you initially drift off faster, it probably won’t benefit your sleep quality in the long run. People who go to bed with alcohol in their system may be more likely to wake early in the morning and not be able to fall back to sleep, another consequence of the rebound effect.

• This may be especially true if you drink alcohol to help you fall asleep faster, and then experience disrupted sleep later in the night without realizing it.
• Older studies have found that drinking alcohol before bedtime lowers melatonin levels and interferes with core body temperatures, which in turn impacts sleep quality.
• They’re helping patients improve their sleep habits (such as making the bedroom a relaxing place and addressing anxiety about the ability to get to sleep), then seeing how, for those whose sleep improves after the therapy, brain activity and moods change.
• Hot flashes or the need to go to the bathroom (as alcohol is a diuretic) fragment sleep and, therefore, more chances to suffer insomnia.

Can You Drink Within Certain Limits?

In addition to disorders of the circadian rhythm, human beings also exhibit a trait-like preference for their timing of sleep and wakefulness that is called chronotype (also known as morningness-eveningness and circadian preference). Chronotype is a product of both the homeostatic sleep drive and the circadian timing 10. Chronotype can be conceptualized as being categorical (“morning”, “evening”, and “indeterminate” or “neither” types) or dimensional (ranging from extreme morningness to extreme evenigness) in nature. The “evening” type (greater eveningness) individual prefers a later bedtime and a later rise time and has a greater need for sleep. This chronotype is commonly seen in adolescents and those with psychiatric disorders. Conversely, the “morning” type individual (greater morningness) prefers an earlier bedtime and an earlier rise time.

• Research indicates that a moderate dose of alcohol up to an hour before bedtime can reduce melatonin production by nearly 20 percent.
• In summary, alcohol misuse (heavy alcohol use and AUD) appears to be linked in a bi-directional fashion to sleep-related problems such as insomnia and circadian rhythm abnormalities.
• As a general rule, stick to having a drink with a gap of at least 4-5 hours before bedtime – as it takes one hour to metabolize a full glass of alcohol.
• When you consume alcohol before bed, your body metabolizes the alcohol throughout the night.
• Alcohol suppresses glutamatergic signaling during intoxication, but as blood alcohol levels decline, the brain compensates by releasing excess glutamate.

“Relying on a single-night sleep study may miss important variations, leading to underdiagnosis or misclassification of OSA severity,” says Professor Eckert. Professor Eckert says that these findings align with the concept of social apnea and highlight the need for multi-night sleep assessments and more personalized approaches to diagnosis and treatment. “We don’t yet know exactly why, but alcohol use, lighter sleep, and less consistent use of OSA therapies likely play a role.” Younger adults (under 60) had a 24% higher risk on weekends, compared to 7% in those aged 60 and above.

Which came first, the depression or the insomnia?

People suffering from depression may already have disrupted circadian rhythms, and the presence of even moderate amounts of alcohol may push those rhythms further out of sync. The liver acts as a filtering system for the body, helping metabolize food and chemicals (including alcohol itself), and pulling toxins from the bloodstream. Like nearly all of the body’s organs, the liver functions according to circadian rhythms. Alcohol interferes with these circadian rhythms regulating the liver, and can contribute to compromised liver function, liver toxicity, and disease.

Sleep occurs over a sustained period, typically lasting approximately 8 hours inhumans. In the absence of continued dosing, alcohol consumed prior to the onset of sleep,therefore, will not be at a constant level throughout the sleep period. Sleep, therefore, could be expected to be affecteddifferently during the initial period of high alcohol levels from the subsequent eliminationphase.

Experts from FHMRI Sleep Health coined the term social apnea to describe this phenomenon. To avoid alcohol dependence, it’s vital to seek a medical professional for your insomnia and alcohol use. Be sure to use the bathroom before bed so your bladder does not wake you in deep sleep. It can also interfere with melatonin production, affecting sleep anticipation in the brain. BetterHelp offers affordable mental health care via phone, video, or live-chat. Although there’s no evidence that alcohol can cause narcolepsy (sleepwalking), it does disrupt REM sleep, which may make the onset of sleepwalking more likely.

The presence of alcohol metabolites such as aldehyde need to be considered in termsof their own possible influence on sleep mechanisms as do secondary effects of alcohol, suchas diuresis. Alcohol is one of the most commonly used psychoactive substances in the community. Nonetheless, alcohol disrupts sleep through multiple mechanisms, such as disrupting electrophysiologic sleep architecture, triggering insomnia, and contributing to abnormalities of circadian rhythms and short sleep duration (SSD) in cross-sectional studies.

Alcohol’s Effects on Hormone Function

In addition to GABA and the glutamate-NMDA system, another agent that only recently has been considered a candidate for mediating alcohol’s sleep effects is adenosine. This molecule is not a neurotransmitter itself but modulates signal transmission by other neurotransmitters, including GABA and glutamate. In general, adenosine inhibits the function of glutamate in the CNS (Dunwiddie 1996).