Alcohol, a substance widely consumed by many, is often linked to feelings of relaxation and social enjoyment. However, it’s not uncommon for people to feel fatigued and drowsy after drinking. The seemingly contradictory effect of a beverage that’s often consumed for its initial stimulating properties has piqued the interest of researchers and everyone wondering why does alcohol make me sleepy.
In this article, we’ll delve into the various ways alcohol contributes to feelings of tiredness, examining its role as a depressant, its impact on sleep quality, and its effect on the body’s energy metabolism.

Alcohol’s Sedative Effects on the Brain
The sedative effects of alcohol on the brain are a primary reason you feel tired after drinking. As a central nervous system depressant, it enhances the impact of GABA, promoting relaxation and drowsiness.
While low doses may initially lead to euphoria and sedation, higher doses or declining blood alcohol levels increase sleepiness and fatigue. Alcohol also suppresses melatonin production, disrupting your natural sleep-wake cycle.
Although it might help you fall asleep faster at first, tolerance can develop quickly, making it less effective as a sleep aid over time.
If you notice a stark connection between drinking alcohol and sleep disturbances, it’s best to start reducing alcohol consumption, however, if that seems impossible, you should definitely contact alcohol addiction specialists, who will help you receive proper treatment.
How Does Alcohol Disrupt Sleep Patterns and Circadian Rhythms
Alcohol has a suppressive effect on REM sleep during the initial part of the sleep cycle, which is then followed by a rebound effect in the later stages. This leads to sleep that is fragmented and compromises its restorative stage.
Alcohol also disrupts the body’s circadian functioning, interfering with the natural sleep-wake cycle and the ability of the master biological clock to synchronize itself.
Chronic alcohol consumption can alter the phase, amplitude, and mean expression of liver clock gene rhythms, potentially resulting in desynchrony between peripheral clocks and the central circadian pacemaker. These disruptions can persist even during periods of abstinence, contributing to long-term sleep disturbances and potentially playing a role in relapse for individuals with alcohol dependence.
The impact of alcohol on sleep and circadian rhythms is particularly concerning as it can create a vicious cycle, where individuals may use alcohol as a sleep aid, only to experience worsened sleep quality and daytime fatigue.
Short and Long-Term Effects of Alcohol on Energy Levels
In the short term, alcohol makes you feel groggy and reduces cognitive function the following day by decreasing REM sleep, which is crucial for restorative sleep.
Long-term alcohol use disorder is linked to chronic sleep disturbances, with 60% of users reporting issues that lead to persistent fatigue. Frequent waking during the night due to alcohol’s diuretic effects further disrupts the quality of your sleep.
Regular heavy drinking can increase your risk of insomnia and sleep apnea by 25%, exacerbating daytime fatigue.
Alcohol can interfere with the body’s ability to absorb and use essential nutrients, such as thiamin, vitamin B12, and zinc, which play a crucial role in energy metabolism. It also impairs the liver’s ability to produce blood sugar, a key source of energy for the body.
On top of that, alcohol can cause a reduction in the production of adenosine triphosphate (ATP), the primary energy source for muscles, which further contributes to decreased endurance and overall energy levels.
Variations in Alcohol’s Negative Effects on Tiredness
People who consume alcohol experience alcohol’s effects on sleep and tiredness differently. Your age, weight, genetics, and health all influence how tired you feel after consuming alcohol.
Older adults tend to be more sensitive to alcohol’s sedative effects, leading to greater tiredness, sleep disturbances and sleep disorders. If you’re an alcoholic, you’re at higher risk for chronic sleep disorders and daytime fatigue due to alcohol’s impact on sleep deprivation.
Tolerance to alcohol’s sedative effects can develop quickly, causing you to drink alcohol more frequently to feel the same level of tiredness. This ultimately worsens sleep quality and leaves you feeling more tired the next day.
Factors like the quantity and timing of alcohol intake, hydration levels, and sleep quality also significantly influence the severity of alcohol-induced fatigue. It’s worth noting that although older adults may experience less noticeable effects on tiredness, alcohol still disrupts sleep structure and quality for all age groups, potentially leading to chronic health issues.

Tips for Mitigating Alcohol-Induced Tiredness
Limiting alcohol consumption to light or moderate levels can help reduce sleep disruptions and fatigue. Staying hydrated by drinking water before, during, and after consuming alcohol is crucial for mitigating fatigue caused by dehydration.
Avoiding alcohol at least 3 hours before bedtime can improve sleep quality and prevent grogginess the next day. Engaging in alternative relaxation techniques, such as meditation or herbal teas, may promote better sleep and counteract alcohol’s sedative effects.
Establishing a regular sleep routine can help maintain consistent sleep patterns, reducing the impact of alcohol-induced disruptions and enhancing overall well-being.
Final Thoughts from Radix Recovery
If you or someone you know is struggling with alcohol use and its related adverse effects, Radix Recovery in Cedar Rapids, Iowa, can help. We provide comprehensive, personalized alcohol addiction treatment designed to support you every step of the way. Our program focuses on understanding the underlying causes of addiction and developing strategies for lasting recovery.