Leave fast? Tap Quick exit or press Esc twice.Quick exit: leave this site now
Everything, A to Z Help now

Body · Substances: the facts

Alcohol: knowing the facts

Alcohol is the most common drug used by people under 21, and about 4,000 young people die from excessive drinking each year. One standard drink is 12 oz of 5% beer, 5 oz of wine or 1.5 oz of liquor, and a strong beer or mixed drink can be two or more. Blood alcohol keeps rising after someone stops drinking or passes out, so "sleeping it off" can kill. Know the overdose signs (confusion, can't stay awake, vomiting, slow or irregular breathing, cold or bluish skin), and if you see even one, call 911 and stay. Never mix alcohol with sleep, anxiety or opioid medicines.

Easy10 min to readFreeChecked October 2, 2026

You'll need

  • 911 and a trusted ride saved in your phone
  • A plan with friends before you go out

What to know

  1. Know what one drink is. In the U.S., a standard drink has 14 grams of pure alcohol: 12 ounces of regular beer (about 5%), 5 ounces of wine, or 1.5 ounces of liquor. A 12-ounce beer at 10% is two drinks, and many light beers have about 85% as much alcohol as regular beer. Source: NIAAA2
  2. Know what binge drinking is: reaching a blood alcohol level of 0.08% or more, typically about 5 or more drinks for men or 4 or more for women in about two hours. High-intensity drinking is twice that or more, and teens and college-age young adults often do both. Source: NIAAA1
  3. Know the overdose signs: confusion or stupor; trouble staying conscious or can't be woken up; vomiting; seizures; slow breathing (fewer than 8 breaths a minute) or irregular breathing (10 seconds or more between breaths); slow heart rate; clammy skin; no gag reflex; very low body temperature, bluish skin or paleness. Source: NIAAA1
  4. Call 911 right away if you suspect an overdose. Don't wait for every symptom, and remember a person who has passed out can die. Source: NIAAA1
  5. Stay with them. Keep them sitting on the ground or partly upright, not in a chair. If they're vomiting, have them lean forward. If they're passed out or lying down, roll them onto one side, ear toward the ground. Source: NIAAA1
  6. Tell responders what they drank and how much, any other drugs they took, and any medications, allergies or health conditions you know of. Source: NIAAA1
Watch out Blood alcohol can keep rising after someone stops drinking or passes out, because alcohol still in the stomach keeps entering the blood. At very high levels the gag reflex can stop working, and a person can choke on vomit. Cold showers, hot coffee and walking don't reverse an overdose and can make it worse. Source: NIAAA1

Standard drinks at a glance

Each of these has about 14 grams of pure alcohol. Source: NIAAA2

DrinkOne standard drink
Regular beer (about 5%)12 ounces
Wine (about 12%)5 ounces
Liquor (about 40%)1.5 ounces, one shot
Strong beer (10%)12 ounces counts as 2 drinks

Dangerous combinations

  • Opioids, prescription or illegal, like oxycodone, morphine or heroin Source: NIAAA1
  • Sleep medicines like zolpidem and eszopiclone Source: NIAAA1
  • Anti-anxiety medicines like diazepam and alprazolam Source: NIAAA1
  • Even over-the-counter antihistamines Source: NIAAA1
  • Mixing increases the effects and can cause an overdose with even moderate drinking. Source: NIAAA1

Before a party

  • Check in with friends before, during and after, and agree how everyone's getting home. Source: RAINN6
  • Keep track of your drink and know what's in it. Source: RAINN6
  • Notice if a friend suddenly seems much drunker than expected, and help them leave or get help. Source: RAINN6
  • Save 911 and a sober ride in your favorites.
  • Decide in advance that you'll call for help, so you don't hesitate.

See it done

Video by TED-Ed Nonprofit

How does alcohol make you drunk?

Full title on YouTube: “How does alcohol make you drunk? - Judy Grisel”2020 · Checked October 3, 2026

This explains what alcohol does inside your body. The overdose signs, and what to do (call 911 and stay with them), are in the steps.

Video won't load at school or work? No problem. Everything you need is in the steps; the video's just a bonus. Watch it on YouTube later.

If it doesn't work

  • Worried about your own drinking, or someone else's? SAMHSA's National Helpline, 1-800-662-4357, is free, confidential, and open 24/7, in English and Spanish. Source: SAMHSA5
  • Feeling hopeless or thinking about hurting yourself? Call or text 988 any time. See 988: when and how to reach out.
  • Someone's been drinking and wants to drive? Don't get in the car. Drinking and driving puts everyone at risk. Source: CDC4 Call a parent, a sober friend, or a ride.

Good to know

The details, if you want them. Tap a line to open it.

Why it hits young people harder

Young people who drink are more likely to have injuries, lower grades, legal trouble, violence and sexual violence, and slower brain development that can affect memory. People who start drinking earlier have a higher risk of alcohol problems later. Source: CDC4

The first six weeks of college

NIAAA calls the first six weeks of freshman year a vulnerable time for harmful drinking because of expectations and social pressure. Source: NIAAA3

Everyone's different

What tips drinking into a life-threatening overdose depends on age, tolerance, sex, how fast someone drinks, medications, and how much they've eaten. Source: NIAAA1

Most people your age aren't binge drinking

9% of high school students reported binge drinking in the past month, and about 16% rode with a driver who'd been drinking. Source: CDC4 Saying no is normal.

Take it with you

Printable cardDownload card (PDF)

Sources

  1. National Institute on Alcohol Abuse and Alcoholism Understanding the dangers of alcohol overdose
  2. National Institute on Alcohol Abuse and Alcoholism What is a standard drink?
  3. National Institute on Alcohol Abuse and Alcoholism Fall semester: the risks of college drinking
  4. Centers for Disease Control and Prevention Underage drinking
  5. Substance Abuse and Mental Health Services Administration National Helpline
  6. RAINN Campus sexual violence: prevention and response

Lesson B10.1 · Last checked October 2, 2026 against the sources listed.

Report a mistake

Next in BodyNicotine and vaping

Need help now?

If you or someone else is in danger, call 911 first. These lines are free, and someone answers.

What to do first, step by step