The only thing that makes drunk go away is time. Your liver breaks down alcohol at a fixed rate of about one standard drink per hour, and nothing you do can meaningfully speed that up. Coffee, cold showers, exercise, food after drinking, and water are all common attempts, but none of them lower your blood alcohol concentration any faster.
How Your Body Processes Alcohol
Your liver does almost all the work. It produces an enzyme that breaks ethanol into a toxic intermediate compound, which then gets broken down further into harmless byproducts your body can eliminate. This process runs at a roughly constant speed: about 7 grams of pure alcohol per hour for an average-sized person, which works out to approximately one standard drink every 60 minutes.
A standard drink contains about 14 grams of pure alcohol. That’s one 12-ounce beer at 5% alcohol, one 5-ounce glass of wine at 12%, or one 1.5-ounce shot of 80-proof liquor. Your blood alcohol concentration drops by about 0.015 per hour. So if you stop drinking at a BAC of 0.08 (the legal driving limit in most states), it takes roughly five to six hours to reach zero.
The math scales linearly. If you had enough drinks to reach a BAC of 0.15, you’re looking at about 10 hours before alcohol is fully cleared from your system. Heavy drinkers sometimes develop a secondary enzyme pathway that can handle slightly more, but for most people, the rate is remarkably consistent and not something you can control.
Why Coffee, Showers, and Exercise Don’t Work
Coffee is the most persistent myth. Caffeine blocks the receptors in your brain that make you feel sleepy and uncoordinated, so it can make you feel more alert after drinking. But that’s a disguise, not a cure. Studies on people who mixed caffeine with alcohol found that they reported feeling less drunk while still performing just as poorly on coordination tests, reaction time, and driving simulations. Their breath alcohol levels were identical to people who drank without caffeine. In other words, caffeine creates a “wide-awake drunk” who overestimates their own sobriety.
Cold showers and fresh air work on a similar principle. The shock of cold water or a brisk wind can jolt your senses and make you feel temporarily more alert, but neither changes the amount of alcohol in your blood by even a fraction. Exercise doesn’t help either. While you do breathe out and sweat out tiny amounts of alcohol, the quantities are negligible compared to what your liver processes. The California Department of Alcoholic Beverage Control puts it plainly: time is the only thing that removes alcohol from the system.
What Actually Helps You Feel Better
While you can’t speed up metabolism, you can manage how miserable the wait feels. Drinking water won’t lower your BAC, but alcohol suppresses a hormone that helps your kidneys retain water, so you urinate more than usual and can become dehydrated. Replacing that fluid helps with headache, dry mouth, and fatigue. That said, recent research found that dehydration and hangovers are two separate consequences of drinking that just happen to overlap. People who drank more water during and after alcohol consumption didn’t experience significantly less severe hangovers the next day.
Eating something can also help with nausea and low blood sugar, which alcohol tends to cause. Food eaten before or during drinking has a real, measurable effect: it slows alcohol absorption, lowers your peak BAC, and delays the time it takes to reach that peak. This doesn’t make existing drunkenness go away faster, but it means less alcohol hits your bloodstream at once, which keeps you from getting as intoxicated in the first place. A meal eaten after you’re already drunk, however, does very little for your BAC since the alcohol is already absorbed.
Sleep is genuinely useful, not because it accelerates metabolism, but because it lets hours pass while your liver does its job. Lying down in a safe position (on your side, not your back) also reduces the risk of choking if you vomit.
How Long It Actually Takes
The timeline depends entirely on how much you drank. Here’s a rough guide based on the standard elimination rate of 0.015 BAC per hour:
- 2 drinks (BAC ~0.04): about 2 to 3 hours to reach zero
- 4 drinks (BAC ~0.08): about 5 to 6 hours
- 6 drinks (BAC ~0.12): about 8 hours
- 8 drinks (BAC ~0.16): about 10 to 11 hours
These are estimates for an average-sized person. Your actual BAC depends on body weight, sex, how fast you drank, and whether you had food in your stomach. Women generally reach higher BAC levels than men from the same amount of alcohol because of differences in body water content and enzyme activity. The alcohol half-life is four to five hours, and full clearance from all body systems can take up to 25 hours after your last drink, according to Cleveland Clinic.
When Drunk Becomes Dangerous
Most of the time, being drunk is uncomfortable and self-limiting. But alcohol overdose is a medical emergency that kills. The National Institute on Alcohol Abuse and Alcoholism identifies these warning signs: mental confusion or stupor, inability to stay conscious or be woken up, vomiting, seizures, breathing slower than 8 breaths per minute, gaps of 10 seconds or more between breaths, clammy skin, bluish or pale skin color, and extremely low body temperature.
A person showing any combination of these symptoms needs emergency medical help. Alcohol continues to be released from the stomach into the bloodstream even after someone stops drinking or passes out, so BAC can still be rising while someone appears to be “sleeping it off.” The absence of a gag reflex at high intoxication levels means vomiting while unconscious can cause choking. Waiting to see if they’ll feel better is the wrong call.