Effects of Alcohol Consumption After Absorption

Shivendra Pratap Singh


High Court Lucknow

Medico Legal

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Published on: 10 Aug, 2023

Alcohol, specifically ethanol, is the active component in alcoholic beverages. Upon consumption, it gets rapidly absorbed into the bloodstream, primarily from the stomach and small intestine. Once absorbed, alcohol exerts a myriad of effects on various systems of the body. Let’s delve into the physiological impact of alcohol after its absorption:

1. Central Nervous System (CNS):

  • Depressant Effect: Alcohol is a CNS depressant. Initially, it might cause euphoria, but as the Blood Alcohol Concentration (BAC) increases, it leads to impaired judgment, slowed reflexes, blurred vision, and poor coordination.
  • Memory Impairment: Alcohol can cause blackouts or periods where the person doesn’t remember events even though they were conscious.
  • Mood Alteration: It may lead to mood swings, depression, or even aggressive behavior.
  • Sleep Disruption: Although alcohol can induce sleep, it disrupts the REM cycle, leading to non-restful sleep.

2. Cardiovascular System:

  • Immediate Effect: Alcohol causes vasodilation, leading to a feeling of warmth but also potential facial flushing and lowered blood pressure.
  • Chronic Use: It can lead to cardiomyopathy (disease of the heart muscle), irregular heartbeat, and hypertension.

3. Digestive System:

  • Gastric Mucosa: Alcohol irritates the stomach lining, leading to gastritis, or inflammation. This can result in nausea, vomiting, and even ulcers.
  • Liver: The liver metabolizes alcohol, but excessive amounts can lead to fatty liver disease, alcoholic hepatitis, fibrosis, and eventually cirrhosis.

4. Kidneys:

  • Diuresis: Alcohol inhibits the secretion of vasopressin (antidiuretic hormone), causing increased urine production and potentially leading to dehydration.

5. Endocrine System:

  • Insulin Release: Alcohol stimulates the pancreas to secrete insulin, which can lead to hypoglycemia (low blood sugar).
  • Sex Hormones: Chronic use can lead to decreased testosterone in males and menstrual irregularities in females.

6. Musculoskeletal System:

  • Muscle Weakness: Chronic alcohol use can cause myopathy or muscle weakness.

7. Immune System:

  • Suppression: Even a single episode of heavy drinking can hamper the body’s ability to ward off infections. Chronic use can lead to more significant immune suppression, increasing susceptibility to diseases.

8. Metabolic Effects:

  • Hypothermia: Despite the feeling of warmth due to vasodilation, alcohol increases heat loss, which can lead to a drop in body temperature.
  • Lactic Acidosis: Alcohol metabolism can increase lactate production, leading to acidosis, especially in situations of hypoxia or low oxygen.

9. Teratogenic Effects:

  • Fetal Alcohol Syndrome: Alcohol consumption during pregnancy can lead to developmental disorders in the fetus, characterized by facial deformities, growth deficits, and cognitive impairment.


The effects of alcohol on the body are wide-ranging and dose-dependent. While moderate alcohol consumption might have certain health benefits for some individuals, excessive and chronic consumption can lead to adverse and potentially irreversible effects. Being aware of these impacts is crucial for informed decision-making about alcohol consumption.


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