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Based on your age, gender and health, it may stay there for two hours or longer. During that time, it touches nearly every organ and system along the way.
When alcohol is consumed in moderation, its long-term effect is small for most adults. A moderate amount is no more than one drink a day for women and two for men.
When you drink more than a moderate amount, or drink more often, that changes. Alcohol can affect you in the following ways.
1. Your Brain SlowsMessages travel between brain cells. When you drink, the pace of thoughts and feelings slows. The way your brain talks with the rest of your body changes. The result? You feel sleepy and uncoordinated.
2. Your Brain ShrinksWhen you drink heavily over time, the structure of your brain changes. Brain cells wither, and the inner core swells. You may have trouble regulating your body temperature, and sleep less soundly. Mood and memory can be affected.
3. Your Blood Pressure ChangesA few drinks a week can lower your blood pressure. With heavier alcohol consumption, the story changes. Chronic heavy drinking – and even one episode of binge drinking – triggers the release of stress hormones. These hormones stiffen blood vessels, which makes your heart work harder to pump blood.
4. Your Heart Beats IrregularlyEven moderate drinking can boost the risk for erratic heart rhythm – atrial fibrillation (AFib). Irregular heart rhythm can quadruple the risk for stroke. It can also double the risk for dementia, and boost your risk for dying from any cause.
5. Your Blood Sugar Can DropAlcohol can cause low blood sugar. Sometimes this occurs right after drinking, but it may take up to 24 hours. Always eat food with alcohol, and stay alert for signs of low blood sugar (feeling sleepy or dizzy). It can be easy to confuse the symptoms with other side effects of drinking too much. If you have diabetes, check your blood sugar before and after you drink any amount of alcohol.
6. Your Body Can’t Do Other WorkDrinking keeps your body from functioning the way it should. Because your body doesn’t have a way to store alcohol, it has to work to metabolize the alcohol before it can handle other important processes.
7. Your Pancreas Is HurtOver time, drinking can interfere with your body’s ability to use glucose for energy. Alcohol damages cells in the pancreas, the organ that makes insulin to keep blood sugar levels in check. You may get a painful swelling called pancreatitis – a condition that raises your risk for pancreatic cancer, diabetes and even death.
8. Your Liver Is HarmedNo organ works harder to clear your body of alcohol than the liver. In the process, the liver makes harmful toxins. Over time, cell damage from these toxins may cause a buildup of fat or scar tissue that stops your liver from working properly. You could even develop cirrhosis, a slow deterioration of the liver that’s life threatening.
9. Your Cancer Risk RisesExperts say drinking – even a little bit – boosts your risk for some types of cancer. Seven out of 10 people with mouth cancer are heavy drinkers. Alcohol has also been linked to cancers of the esophagus, breast, liver, throat and colon. Cell damage, changing hormone levels and toxins released when alcohol breaks down may be to blame.
10. Your Immune System WeakensAlcohol holds interferes with your body’s normal defenses against bacteria and other bugs that make you sick. Your body may produce too much of some disease-fighting chemicals and too little of others. The imbalance can cause damage to some healthy tissues and leave others weak. Heavy drinkers face a higher risk for pneumonia, tuberculosis and other health issues.
When you cut back or quit drinking altogether, it lowers your risk for alcohol dependence and can improve your health in many ways. If you’re ready to make a change, try these steps:
If you worry that you may have a problem, talk with your doctor. Your doctor may provide treatment or have suggestions for referrals. If you don’t have a doctor, call the customer service number on your member ID card.
Read Prescription or Over the Counter: Follow Directions for Medicine Safety to find out how alcohol and medicine can interact in dangerous ways.
Originally published 3/2/2021; Revised 2022
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