Medically reviewed by Peter Scheid, MD
Medical Director, SILC Health
Clinically reviewed by Alexandra Truman, LMFT
Clinical Director, Substance Use Services — SILC Health
Last reviewed: June 16, 2026
The honest answer to "how to get alcohol out of your system fast" is: you can't, really. The liver metabolizes alcohol at a roughly fixed rate — about one standard drink per hour — regardless of what you do. Water, coffee, exercise, cold showers, food, and the dozens of "detox" products marketed online don't speed up the underlying process. The blood alcohol concentration comes down at the pace your liver dictates, and that's it.
That said, the question is often about something deeper than literal blood alcohol clearance. People search this because they're hungover, because they have a drug test coming up, because they're trying to sober up before something important, or because they've recognized a pattern they want to break. The answer depends on which version of the question you're actually asking. Below covers each.
How alcohol leaves the body — the actual mechanism
About 90–95% of alcohol metabolism happens in the liver, primarily through two enzymes: alcohol dehydrogenase (ADH), which converts ethanol to acetaldehyde, and aldehyde dehydrogenase (ALDH), which converts acetaldehyde to acetate. The acetate then enters normal metabolic pathways and gets broken down into water and carbon dioxide.
The remaining 5–10% leaves through breath, sweat, and urine — which is why breathalyzers work. But the bulk of clearance is liver-mediated, and the rate is constrained by the amount of enzyme available. For most adults, this works out to clearing about one standard drink (14g of pure alcohol — one beer, one 5oz glass of wine, or one 1.5oz shot) per hour.
There's individual variation. Body size, sex, liver health, and genetic variations in ADH and ALDH all affect the rate. People of East Asian descent often have a variant of ALDH that processes acetaldehyde more slowly — producing the flushing and intolerance response sometimes called "Asian flush." Heavy chronic drinkers may have upregulated liver enzymes, processing alcohol slightly faster than baseline.
What actually helps when you've had too much
You can't speed up the underlying metabolism, but you can do several things that help with how you feel and with safety:
Hydrate
Alcohol is a diuretic — it suppresses antidiuretic hormone, causing you to urinate more than the water you drank in the alcoholic beverage itself. Most hangover symptoms (headache, fatigue, nausea) are partially driven by dehydration. Drinking water doesn't speed up alcohol metabolism, but it does address the dehydration and reduces the severity of the symptoms.
Eat
Food in your stomach slows alcohol absorption from any subsequent drinking and stabilizes blood sugar, which alcohol metabolism disrupts. It doesn't speed up clearance of alcohol already absorbed, but it helps you feel less terrible.
Sleep
Sleep doesn't make alcohol clear faster, but it lets you ride out the metabolic process without making things worse. Alcohol-disrupted sleep is poor quality, but rest is still rest.
Time
The single thing that actually clears alcohol from your system is time. Roughly one drink per hour. If you had four drinks at midnight, you'll be at zero around 4 a.m. — give or take, depending on your individual rate.
What doesn't work
- Coffee — wakes you up but doesn't speed metabolism. A drunk and tired person becomes a drunk and awake person, which is sometimes more dangerous because they think they've sobered up.
- Cold showers — wake you up; don't speed clearance.
- Exercise — increases heart rate and can produce small amounts of additional excretion through sweat (3–5% of total clearance), but doesn't meaningfully change the bulk liver-metabolism path.
- "Detox" drinks and pills — none have evidence of accelerating alcohol metabolism. Most are marketed for general "liver support" with no real effect on the specific question.
- Throwing up — only removes alcohol still in the stomach. Once it's been absorbed (which happens within roughly an hour of drinking), vomiting doesn't reduce blood alcohol.
Detection windows for tests
If the question is about passing a drug test, here are the detection windows by test type:
- Breathalyzer: detects alcohol while it's still being metabolized — roughly until your BAC reaches zero.
- Blood test: detects alcohol up to 12 hours after the last drink.
- Urine (standard): detects alcohol up to 24 hours after last drink. Common in workplace testing.
- Urine (EtG / EtS): metabolites detectable for 24–72 hours after the last drink, sometimes longer with heavy use. This is the most common test for treatment programs and probation monitoring.
- Hair: up to 90 days, but not commonly used for alcohol.
EtG (ethyl glucuronide) and EtS (ethyl sulfate) tests are the ones that catch alcohol use long after the parent compound is gone. These are standard in many treatment, probation, and aftercare settings — they exist precisely because the metabolic clearance question and the detection question are different.
When the question is actually about withdrawal
A meaningful fraction of people who search this question are trying to figure out how to stop drinking. The literal blood-alcohol clearance answer ("one drink per hour") isn't actually what they need — what they need is information about safe cessation. For someone physically dependent on alcohol, abrupt withdrawal can produce grand mal seizures (typically 12–48 hours after the last drink) and delirium tremens (3–5% of severe cases). Historical mortality for unmedicated DTs was up to 35%; with proper medical detox it's under 5%.
Medical alcohol detox replaces the dangerous unsupervised version of withdrawal with a controlled one. Benzodiazepine taper, anti-seizure medications, IV fluids, vitamin replacement, and 24/7 monitoring keep you safe through the first 5–7 days. From there, the work is what comes next — addressing the pattern that drove the drinking, building tools that don't depend on willpower alone.
What to do next
If you're searching how to get alcohol out of your system because you want to stop drinking and you're not sure how — that's a clinical conversation worth having. SILC Health's medical alcohol detox is available across our facilities. See our alcohol detox page for the full protocol, or call admissions to verify benefits and talk through what's actually involved. Free, confidential, no obligation.