By Douglas McWilliams M.D., Board Certified Psychiatrist – Columbia, MD
Virtual Appointments Across Maryland, Wisconsin, and Virginia
In a continuation of posts about sleep, I thought it might be helpful to discuss a topic that comes up frequently in the world of insomnia. Many people with insomnia eventually resort to alcohol. A glass of wine in the evening takes the edge off, quiets a busy mind, and makes falling asleep feel easier. It works — at least for a little while. Later, it causes lasting problems – even in moderation.
Alcohol Is Not a Sleep Aid
Alcohol is a sedative. It slows the central nervous system, which is why it produces that familiar feeling of relaxation and drowsiness – yes, in high enough quantities it can make you unconscious through brute force sedation. However, sedation is not the same thing as sleep. The neurologic activity that occurs during natural sleep — the cycling through stages, the memory consolidation, the physiological restoration — is changed by alcohol, not facilitated by it.
This distinction matters. You may fall asleep faster after drinking, but the sleep you get is of measurably lower quality and risky at maintaining a healthy sleep architecture into the future.
What Alcohol Actually Does to Sleep
It fragments the second half of your night – Alcohol is metabolized relatively quickly. As your body processes it over the first few hours of sleep, its sedative effect wears off. This not only reduces your sleep pressure, but also causes you to wake up. Your nervous system, which was suppressed, becomes more active. Your sleep drive thinks you just got a full night’s rest, so it’s more difficult to fall back asleep. This is why people who drink in the evening often sleep reasonably well for the first few hours and then find themselves wide awake at 2 or 3 AM, unable to return to sleep.
It suppresses REM sleep – REM (rapid eye movement) sleep is the stage most associated with dreaming, emotional processing, and memory consolidation. Alcohol, even in small amounts significantly delays REM sleep into the later half of the night. Your brain tries to compensate later, which can produce vivid or disturbing dreams toward morning and contribute to that groggy, unrefreshed feeling even after a full night in bed.
It worsens sleep apnea – Alcohol relaxes the muscles of the throat and airway. For people with obstructive sleep apnea — or those at risk for it — this means more frequent and more severe breathing disruptions during sleep. If you snore or have been told you stop breathing during sleep, alcohol is likely making it significantly worse. If you only snore when you drink alcohol, it’s a good sign that the alcohol is pushing you towards sleep apnea.
It disrupts your sleep architecture overall. A normal night of sleep moves through predictable cycles of light sleep, deep sleep, and REM sleep. Alcohol distorts this pattern, temporarily front-loading deeper sleep and suppressing REM early in the night, then shifting toward lighter, more fragmented sleep in the second half. Our brains are meant to follow a specific process to most efficiently use sleep for restoration. This distortion causes major changes across the sleep cycle, messing up the delicate equilibrium.
Alcohol Becomes Habit Forming
One of the more insidious effects of using alcohol as a sleep aid is tolerance. The initial sedative effect that made that glass of wine feel helpful diminishes over time. Eventually, you need more to get the same effect. As the quantity increases, so does sleep disruption. What started as a glass of wine becomes two, then three, while sleep quality quietly deteriorates.
If your nervous system comes to rely on alcohol to initiate sleep, stopping can produce rebound insomnia that feels even worse than the original problem – imaging going from 4 hours of sleep to no sleep at all for several days. This is one reason why winding down an alcohol-as-sleep-aid habit can be difficult without support.
How Much Is Too Much?
Research suggests that even moderate alcohol consumption (one to two drinks) can measurably affect sleep quality, particularly REM sleep. The effects are dose-dependent: more alcohol means more disruption. The timing also matters, the closer the drink is to bedtime, the more impactful.
What to Do Instead
CBT-I (Cognitive Behavioral Therapy for Insomnia) addresses the root causes of insomnia — the behavioral patterns, thought patterns, and physiological arousal that maintain it — without the side effects or dependency risk of alcohol or sleep medication. It’s the most effective long-term treatment for chronic insomnia, and it works for people who have struggled with sleep for years.
If you’re using alcohol to sleep and want to explore a more effective approach, I offer virtual CBT-I therapy to adults across Maryland, Wisconsin, and Virginia. A free 15-minute consultation is a good place to start.
Douglas McWilliams, M.D. is a board-certified psychiatrist based in Columbia, Maryland, offering virtual psychiatric services to patients throughout Maryland, Virginia, and Wisconsin. He does not provide ketamine treatment but collaborates with ketamine providers locally and nationally as part of comprehensive, individualized care.
This article is intended for educational purposes and does not constitute medical advice. If you are experiencing a psychiatric emergency, please contact 988 (Suicide & Crisis Lifeline) or go to your nearest emergency room.