Arielle Cruz
Alcohol has a sedative effect on the body, which can make you feel drowsy and lethargic. However, it can also interfere with your sleep quality, leaving you feeling tired the next day and even leading to daytime naps, which can further disrupt your sleep. Additionally, alcohol can cause dehydration, which can result in fatigue, and it can also impact your blood sugar levels, leading to hypoglycaemia and symptoms such as dizziness and fatigue. Regular alcohol consumption can also increase the risk of gout, which can disturb sleep and contribute to feelings of tiredness. Furthermore, alcohol withdrawal and sobriety fatigue can cause extreme tiredness, affecting individuals both physically and mentally, as the body adjusts to life without alcohol.
| Characteristics | Values |
|---|---|
| Alcohol's sedative quality | Makes you drowsy or lethargic |
| Alcohol disrupts the body's regular sleep cycle | Makes the body more active during the night |
| Alcohol interferes with quality sleep | Leads to frequent waking, restless sleep, and possibly nightmares |
| Alcohol increases the heart rate | Elevates the heart rate during the second half of the night |
| Alcohol relaxes the muscles in the throat and upper neck | Increases the likelihood of snoring |
| Alcohol leads to frequent urination and perspiration | Elevates the heart rate and leads to night sweats |
| Alcohol interferes with REM sleep | Leads to tiredness the next day |
| Alcohol increases the risk of gout | Leads to joint pain and swelling of the lower body joints |
| Alcohol leads to low blood sugar levels | Leads to hypoglycaemia |
| Alcohol affects neurotransmitters | Leads to fatigue |
| Alcohol affects younger adults more than older adults | Older adults have more consistent sleep routines than younger adults |
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What You'll Learn
Alcohol's sedative effect
Alcohol has both stimulant and sedative effects on the human body. While the stimulant effects are more rewarding, the sedative effects can make you drowsy and lethargic. The sedative quality of alcohol can rob you of energy and make you feel tired. Alcohol is a depressant substance that affects the central nervous system. It slows down your nervous system and relaxes you. It decreases your blood pressure, heart rate, and mental clarity.
Research has found that drinking excessive amounts of alcohol can interrupt REM sleep, which is essential for boosting memory and concentration. A lack of REM sleep can lead to frequent waking, restless sleep, and possibly nightmares. This can result in daytime naps, making it more difficult to fall asleep at night. Additionally, efficient sleep is needed to maintain a healthy immune system. During sleep, the body produces and releases cytokines, proteins that regulate the immune response. Regularly losing out on sleep due to alcohol consumption can reduce cytokine production, increasing the risk of developing illnesses like the cold or flu.
The impact of alcohol on sleep and next-day tiredness also varies with age, with younger adults experiencing greater interference with sleep duration and heightened tiredness compared to older adults. This may be due to the more consistent sleep routines of older adults, allowing them to circumvent the negative impact of alcohol on sleep and subsequent daytime fatigue.
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REM sleep interruption
Alcohol has a sedative effect, which can make you feel drowsy. However, alcohol also interferes with the quality of your sleep.
Sleep consists of two phases: REM and non-REM sleep. Non-REM sleep has three stages, while the REM stage is the final stage of sleep. During the REM stage, the eyes move rapidly in various directions, and dreams occur. This stage is important for learning, memory, and mood. It is also when most people dream vividly.
Alcohol prevents people from entering the REM phase, which means the brain and body cannot restore themselves. As a result, people experience less REM sleep and more non-REM sleep, specifically "deep sleep". Later in the night, once the body has metabolized the alcohol, there is a REM rebound, causing longer than usual REM periods with vivid dreams.
The effects of alcohol on sleep can lead to overall low-quality sleep, leaving you feeling tired for several days after drinking. To avoid this, it is recommended to avoid alcohol consumption in the hours before bed.
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Neurochemical imbalance
Alcohol consumption can have a significant impact on neurochemical balance, particularly with regular and excessive intake. Alcohol is a depressant that increases inhibitory neurotransmission and decreases excitatory neurotransmission, resulting in a sedative effect. While this can initially make you feel drowsy, it can also interfere with the quality of your sleep, leaving you feeling tired the next day.
Neurochemically, alcohol interacts with multiple neurotransmitter systems, disrupting the balance between inhibitory and excitatory neurotransmitters. Short-term alcohol exposure tilts this balance towards inhibition, but with long-term exposure, the brain attempts to compensate by restoring equilibrium. This compensation, however, can lead to the development of tolerance, craving, and alcohol-seeking behaviour.
Chronic heavy drinking can impact various neurocircuits, including brain regions involved in motivation, memory, decision-making, impulse control, attention, and sleep regulation. The development of alcohol dependence is a complex process that reflects a maladaptive neurophysiological state. It is characterised by perturbations in neurochemical systems, including glutamate, γ-aminobutyric acid (GABA), monoamines, neuropeptides, and ion channels. These changes contribute to significant neural activity alterations, compromising the functional integrity of the brain.
With repeated heavy drinking, tolerance develops, and alcohol's ability to produce pleasure and relieve discomfort decreases, which can lead to escalated alcohol use. During acute and protracted withdrawal, individuals may experience a profound negative emotional state called hyperkatifeia, characterised by dysphoria, malaise, irritability, pain, and sleep disturbances.
The amino acids glutamate and GABA play crucial roles in the CNS as the major excitatory and inhibitory neurotransmitters, respectively. Chronic alcohol exposure results in compensatory changes in these systems, leading to an imbalance in GABA-mediated inhibition and glutamate-mediated excitation. This imbalance underlies various withdrawal symptoms, including central nervous system hyperexcitability.
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Dehydration
To prevent dehydration, it is important to drink plenty of water, especially during hot weather, exercise, or illness. Avoiding drinks that can contribute to dehydration, such as alcohol and caffeinated beverages, is also recommended. It is suggested to match each alcoholic drink with a glass of water to maintain hydration and moderate intake.
The symptoms of dehydration can vary and may include tiredness or fatigue. This occurs because when dehydrated, your tissues have less fluid, leading to feelings of tiredness. Dehydration can also cause thirst, dark-coloured urine, dizziness, weakness, dry mouth, rapid heart rate, and confusion.
If you suspect dehydration, increasing your fluid intake is crucial. Mild to moderate dehydration can usually be treated by consuming more fluids, especially oral rehydration solutions that contain electrolytes. However, in cases of severe dehydration, immediate medical attention is necessary, and intravenous (IV) fluids may be required.
It is important to note that the recommended daily fluid intake is generally around 6 to 8 glasses of fluid, but this may vary depending on individual factors such as weight, age, activity level, and climate.
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Blood sugar spikes
Alcohol can cause blood sugar spikes and influence how the body regulates blood sugar levels. The liver is the organ that stores and releases glucose (sugar) into the bloodstream, helping to maintain healthy blood sugar levels. However, when you consume alcohol, the liver has to work to break it down, and during this time, it stops releasing glucose. As a result, blood sugar levels can drop, and you are at risk of hypoglycemia (low blood sugar). This is especially true if you drink on an empty stomach, as the liver will prioritise metabolising the alcohol over maintaining blood glucose levels.
For people with diabetes, drinking alcohol can be particularly risky, as alcohol can interfere with diabetes medications, increasing the risk of hypoglycemia. Alcohol can also worsen diabetes complications such as nerve, eye, or kidney damage. Additionally, alcoholic drinks such as beer and sweetened mixed drinks are often high in carbohydrates, which can raise blood sugar levels.
When you stop drinking alcohol, your body has to readjust and learn how to control blood sugar levels on its own again, which can lead to periods of fatigue and exhaustion known as sobriety fatigue. This is because, during heavy drinking, the brain doesn't rely as much on glucose for fuel, and when you quit, it needs to relearn how to use glucose efficiently, which can take time and energy.
To minimise blood sugar spikes while drinking alcohol, it is important to drink in moderation, not on an empty stomach, and to be aware of the carbohydrate and calorie content of different alcoholic beverages. Monitoring blood sugar levels before, during, and after drinking can also help manage blood sugar spikes.
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Frequently asked questions
Alcohol has a sedative quality that can make you drowsy and lethargic. It can also suppress melatonin, which regulates the sleep cycle, and affect your REM sleep, which may result in frequent waking, restless sleep, and nightmares. This can lead to daytime naps, making it harder to fall asleep at night.
Alcohol can disrupt your sleep quality by affecting your circadian rhythm, which controls functions like metabolism, immunity, mood, and cognitive function. You may experience breathing difficulties, excessive snoring, and a need to urinate more frequently due to alcohol's diuretic effect, all of which can impact your sleep.
Alcohol interferes with the balance of neurotransmitters in the brain, particularly serotonin and dopamine. While serotonin promotes sleep and mood regulation, dopamine regulates attention, motivation, and reward. An imbalance in these neurotransmitters can lead to fatigue.
Yes, here are some strategies to consider:
- Stay hydrated by matching each alcoholic drink with a glass of water.
- Choose clear liquors, as darker alcohols contain more congeners, which can worsen hangover symptoms.
- Limit sugary mixers to avoid blood sugar spikes and crashes.
- Get quality sleep by maintaining a dark, quiet, and comfortable sleep environment.
- Eat a nutritious breakfast with eggs, avocado, and whole grains to stabilize blood sugar levels and boost energy.
Yes, regular alcohol consumption can increase the risk of gout, which is associated with joint pain and swelling that may disturb sleep and contribute to tiredness. Additionally, alcohol can negatively impact your immune system by disrupting sleep, as adequate sleep is necessary for your body to produce cytokines, which regulate immune response.
