Excessive alcohol use is any drinking pattern that puts your health or safety at risk. It includes binge drinking, heavy drinking, any alcohol use during pregnancy, and any drinking by people under 21. About 17% of U.S. adults binge drink, and 6% drink heavily, making it one of the most common preventable health risks in the country.
How Excessive Drinking Is Defined
There are several distinct patterns that fall under the umbrella of excessive alcohol use, and binge drinking is the most common. The National Institute on Alcohol Abuse and Alcoholism defines binge drinking as consuming enough alcohol in about two hours to bring your blood alcohol concentration to 0.08% or higher. For most adults, that means five or more drinks for men or four or more drinks for women in a single sitting. For teenagers, the threshold is lower: roughly three drinks for girls and three to five for boys, depending on age and body size.
Heavy drinking is a pattern measured over a week rather than a single occasion. It’s defined as 15 or more drinks per week for men or 8 or more drinks per week for women.
Any alcohol consumption during pregnancy is also classified as excessive because there is no known safe amount at any stage of pregnancy. The same applies to any drinking by people under the legal drinking age of 21.
What Counts as One Drink
The numbers above only make sense if you know what a “standard drink” actually looks like. One drink contains about 14 grams of pure alcohol. In practical terms, that’s 12 ounces of regular beer (5% alcohol), 5 ounces of wine (12% alcohol), 8 ounces of malt liquor (7% alcohol), or a 1.5-ounce shot of 80-proof spirits (40% alcohol). A large glass of wine at a restaurant often holds 8 to 10 ounces, meaning it could count as nearly two drinks. Similarly, craft beers with higher alcohol content pack more per glass than you might expect.
Where the Line Is for Moderate Drinking
The Dietary Guidelines for Americans set the boundary at 2 drinks or fewer per day for men and 1 drink or fewer per day for women. Anything above that is considered excessive. The guidelines also note that drinking less is better for health than drinking more, and that some people should avoid alcohol entirely, including anyone who is pregnant.
Short-Term Risks
The immediate dangers of excessive drinking go well beyond a hangover. A single episode of heavy drinking raises the risk of injuries from falls, car crashes, burns, and drowning. It increases the likelihood of violence, including domestic violence and sexual assault. Alcohol poisoning is a medical emergency that can occur when someone drinks a large amount in a short period, suppressing the body’s basic functions like breathing and heart rate.
Binge drinking also impairs judgment in ways that lead to risky sexual behavior and unintended pregnancies. These aren’t risks that build over years of drinking. They can happen the first time someone drinks excessively.
Long-Term Health Consequences
Chronic excessive drinking damages nearly every organ system in the body. The liver takes the most direct hit because it processes alcohol. Over time, heavy drinking can progress through a cascade of liver diseases: fatty liver, inflammation, scarring (fibrosis), and eventually cirrhosis, where the liver loses its ability to function. Liver cancer is also a well-established risk.
The heart is similarly vulnerable. Long-term heavy drinking weakens the heart muscle, a condition called cardiomyopathy, and raises the risk of high blood pressure, irregular heartbeat, and heart attack. It can also cause blood abnormalities, including low red blood cell counts, low white blood cell counts, and low platelet levels.
The cancer risks are especially striking because they begin at relatively low levels of consumption. The U.S. Department of Health and Human Services classifies alcohol as a known human carcinogen. Even one drink per day can increase a woman’s risk of breast cancer by 5% to 15% compared to women who don’t drink at all. Beyond breast cancer, alcohol is clearly linked to cancers of the mouth, throat, voice box, esophagus, liver, and colon. Chronic heavy drinking also inflames the pancreas, which is itself a risk factor for pancreatic cancer.
Other long-term consequences include stroke, chronic high blood pressure, and nerve damage that can affect heart rhythm and blood pressure regulation.
Alcohol Use During Pregnancy
Alcohol crosses the placenta and reaches the developing baby. There is no safe amount and no safe trimester. Drinking during pregnancy raises the risk of miscarriage, preterm birth, stillbirth, and sudden infant death syndrome (SIDS). It can also cause fetal alcohol spectrum disorders, a range of lifelong physical, behavioral, and intellectual disabilities. Alcohol exposure in the first three months of pregnancy can cause abnormal facial features, while growth and nervous system problems can result from drinking at any point during pregnancy.
When Excessive Use Becomes a Disorder
Excessive drinking and alcohol use disorder are related but not the same thing. Most people who drink excessively do not have a diagnosable disorder. Alcohol use disorder is a clinical diagnosis based on a pattern of 11 possible symptoms occurring within a 12-month period. These include building a tolerance so that the same amount of alcohol has less effect, experiencing withdrawal symptoms, spending a great deal of time obtaining or recovering from alcohol, feeling strong cravings, failing to meet responsibilities at work or home, giving up activities you used to enjoy, and continuing to drink despite knowing it’s causing physical or psychological harm.
The severity depends on how many of these symptoms are present: 2 to 3 symptoms indicates a mild disorder, 4 to 5 is moderate, and 6 or more is severe. Having just one or two of these experiences doesn’t meet the diagnostic threshold, but it can signal that your drinking pattern is moving in a concerning direction.
The Broader Cost
Excessive alcohol use cost the United States an estimated $249 billion in 2010, driven largely by lost workplace productivity, along with healthcare expenses and criminal justice costs. On a personal level, the toll shows up in strained relationships, missed work, legal problems, and a gradual narrowing of life as drinking takes up more time and energy. Because excessive drinking is so common and its health effects so wide-ranging, it remains one of the leading preventable causes of death in the country.