How Long Does It Take to Get Drunk?

Most people begin to feel the effects of alcohol within 15 to 30 minutes of their first drink.

How long it takes to get drunk depends on blood alcohol concentration (BAC), which rises based on the number of standard drinks consumed per hour, body weight, sex assigned at birth, food intake, and individual liver enzyme activity.

When alcohol reaches a BAC of 0.08% or higher, impairment is legally significant in every U.S. state, but measurable impairment begins at a BAC as low as 0.02%.

Key Takeaways

• Alcohol enters the bloodstream within 30 to 70 minutes, with peak BAC occurring at 30 to 90 minutes after the last drink.
• According to the 2023 National Survey on Drug Use and Health (SAMHSA), 28.9 million people ages 12 and older, representing 10.2% of this age group, met diagnostic criteria for Alcohol Use Disorder (AUD) in the United States.
• The liver metabolizes approximately one standard drink per hour at a rate of 0.015% BAC per hour, regardless of body size, coffee consumption, or exercise.
• Drinking on an empty stomach accelerates alcohol absorption by 25 to 50% compared to drinking with a high-fat meal, significantly shortening the time it takes to become intoxicated.
• The Widmark formula, developed by Swedish physician Ernst Widmark in 1932, remains the standard mathematical model for estimating peak BAC from dose, body weight, and sex-based body water distribution.

What Counts as “Drunk”?

Intoxication by alcohol exists on a continuum from mild euphoria to fatal respiratory depression, and the BAC threshold that defines “drunk” varies by context, legal standard, and individual tolerance level developed through repeated alcohol exposure.

Standard Drink Definition

• NIAAA standard drink: The National Institute on Alcohol Abuse and Alcoholism (NIAAA) defines one standard drink as containing 14 grams of pure ethanol, equivalent to 12 ounces of regular beer (5% ABV), 5 ounces of wine (12% ABV), or 1.5 ounces of 80-proof distilled spirits (40% ABV).
• Common miscalculation: Craft beers, large wine pours, and cocktails containing multiple spirits frequently contain 2 to 4 standard drinks per serving, causing people to underestimate their actual ethanol intake by a factor of 2 or more.

Legal vs. Clinical Intoxication

• Legal threshold: A BAC of 0.08% (80 mg/dL) constitutes per se legal intoxication for driving in all 50 U.S. states; at this level, divided attention, reaction time, and visual tracking are measurably impaired.
• Clinical impairment onset: Measurable cognitive and psychomotor impairment begins at BAC 0.02% to 0.03%, well below the legal threshold; most individuals notice reduced inhibition and mild euphoria at this level, commonly called “tipsy.”
• DSM-5-TR Alcohol Intoxication: DSM-5-TR defines Alcohol Intoxication as recent ingestion of alcohol producing clinically significant problematic behavioral or psychological changes including inappropriate sexual or aggressive behavior, lability of mood, impaired judgment, and one or more of the following: slurred speech, incoordination, unsteady gait, nystagmus, impairment of attention or memory, or stupor/coma.

What Causes BAC to Rise at Different Rates?

The speed at which a person becomes drunk reflects the rate of ethanol absorption into the bloodstream relative to the liver’s constant metabolic clearance rate, a balance that alcohol dehydrogenase (ADH), CYP2E1, and first-pass metabolism all influence.

Body Weight and Body Composition

• Volume of distribution: Ethanol distributes into total body water, so individuals with greater lean body mass (and therefore higher body water content) achieve lower peak BAC per standard drink than individuals with lower body weight or higher body fat percentage, as established by the Widmark formula (BAC = Dose ÷ [r × Weight], where r = 0.7 for males, 0.6 for females).
• Body fat vs. lean mass: Adipose tissue contains minimal water, meaning individuals with higher body fat percentages relative to lean mass reach higher BACs per drink than their scale weight alone would predict.

Biological Sex and Alcohol Metabolism

• Lower ADH activity: Females have lower gastric alcohol dehydrogenase (ADH) activity than males, meaning less ethanol undergoes first-pass metabolism in the stomach before entering the systemic bloodstream; this allows a higher proportion of ingested alcohol to reach peak blood concentration.
• Lower average body water: Females average approximately 52% body water compared to 61% in males; this reduced distribution volume results in higher peak BAC per standard drink for females relative to males of equal body weight, making females clinically more susceptible to alcohol-related harm at equivalent intake levels.
• Hormonal effects: Alcohol is absorbed more rapidly during the premenstrual phase, when progesterone levels are elevated, producing higher peak BACs at the same dose compared to other phases of the menstrual cycle.

Food in the Stomach

• Delay of gastric emptying: Food, particularly dietary fat and protein, delays gastric emptying and slows ethanol transit into the duodenum, where most alcohol absorption occurs; eating a high-fat meal before drinking can reduce peak BAC by 25 to 50% compared to drinking on an empty stomach.
• Timing matters: Food consumed before or during drinking is significantly more effective at slowing BAC rise than food consumed after drinking, when absorption has already accelerated.

Alcohol Tolerance

• Metabolic tolerance: Chronic heavy alcohol exposure induces CYP2E1 upregulation in the liver, increasing ethanol metabolism rate and reducing the subjective “drunk” feeling at a given BAC level; this metabolic tolerance does not reduce alcohol-related organ damage and creates false confidence about level of impairment.
• Functional tolerance: Central nervous system adaptation to chronic ethanol exposure reduces perceived impairment at blood concentrations that would cause severe intoxication in alcohol-naive individuals, a mechanism associated with the development of Alcohol Use Disorder (AUD) and the neuroadaptive changes that drive dependence.

How Long Does It Take to Get Drunk: A Timeline by BAC

The progression from sober to clinically intoxicated follows a predictable BAC-linked sequence documented by the NIAAA and originally systematized by Swedish physician Ernst Widmark’s 1932 pharmacokinetic research on ethanol distribution and elimination.

Stage 1: Subclinical (BAC 0.001% to 0.029%)

• Time to reach: One standard drink in an average-weight adult raises BAC by approximately 0.02% to 0.03% over 30 to 45 minutes after drinking; most people remain clinically sober at this level with only subtle mood lightening detectable on standardized testing.
• GABA potentiation begins: Ethanol potentiates GABA-A receptor activity and inhibits NMDA receptor-mediated glutamate transmission at the earliest clinically detectable BAC levels, producing the initial anxiolytic and mild sedating effects that drive initial alcohol consumption.

Stage 2: Euphoria and “Tipsy” (BAC 0.03% to 0.059%)

• Time to reach: Two standard drinks within one hour produce this BAC range in most adults weighing 150 to 180 pounds drinking on a moderate meal; onset of the subjective “tipsy” sensation typically occurs within 30 to 60 minutes of the second drink.
• Effects: Reduced inhibition, increased confidence, slight coordination reduction, and mildly impaired judgment characterize this stage, which is the BAC range most commonly associated with social drinking and the early stages of binge drinking episodes.

Stage 3: Excitement (BAC 0.06% to 0.099%)

• Time to reach: Three to four standard drinks within two hours typically produce BAC in this range for a 150-pound adult; at 0.08%, legal intoxication is established for driving purposes in the United States.
• Impairment at this stage: Reaction time is measurably slowed, divided attention is compromised, emotional lability emerges, and judgment regarding risk-taking behavior is significantly impaired, accounting for the large number of traffic fatalities and interpersonal injuries that occur in this BAC range.

Stage 4: Confusion (BAC 0.10% to 0.199%)

• Effects: Slurred speech, significant motor incoordination, confusion, impaired memory formation (retrograde amnesia begins at this level), nausea, and emotional dysregulation characterize BAC in this range; functioning in this range is visibly and markedly impaired to observers.
• Time to reach: Consuming 5 to 8 drinks within 2 to 3 hours can produce BAC in this range for many adults, depending on body weight and food consumption; binge drinking is defined by NIAAA as consuming enough alcohol to reach 0.08% BAC, a threshold often exceeded well before the behavioral signs of confusion become apparent.

Stage 5: Stupor (BAC 0.20% to 0.299%)

• Medical emergency threshold: At BAC above 0.20%, aspiration risk increases substantially as the gag reflex is suppressed; stupor, inability to stand, severe vomiting, and loss of consciousness characterize this range and constitute an acute medical emergency requiring monitoring for aspiration and airway compromise.

Stage 6: Coma and Death (BAC 0.30% and above)

• Life-threatening range: BAC above 0.30% produces alcohol-induced coma through profound brainstem depression, while BAC above 0.45% is associated with fatal respiratory depression; deaths from alcohol poisoning occur at BAC levels achievable by competitive drinking or rapid binge consumption.
• CIWA-Ar relevance: The Clinical Institute Withdrawal Assessment for Alcohol, Revised (CIWA-Ar) is the validated 10-item clinical tool used to assess withdrawal severity in patients presenting after heavy chronic alcohol use and guides benzodiazepine-based detoxification protocols; CIWA-Ar scores above 15 indicate severe withdrawal requiring inpatient medical management.

How Long Does It Take to Get Sober?

Once peak BAC is reached, the liver eliminates ethanol at a fixed rate of approximately 0.015% BAC per hour through the activity of alcohol dehydrogenase (ADH) in hepatocytes, regardless of coffee consumption, exercise, or cold showers, which are physiological myths that do not accelerate ethanol clearance.

Calculating Sobering Time

• Standard calculation: A person who reaches a peak BAC of 0.10% will return to zero BAC in approximately 6.5 to 7 hours (0.10 ÷ 0.015 = 6.7 hours) assuming no additional alcohol consumption; sleep during this period does not accelerate clearance.
• Next-day impairment: Heavy drinking that produces BAC above 0.15% can leave residual impairment from 5 to 12 hours after the last drink, explaining why individuals who stop drinking at midnight after heavy consumption may still be legally impaired while driving at 6 AM.
• Hangover vs. sobriety: Hangover symptoms including headache, nausea, fatigue, and cognitive impairment persist after BAC has returned to zero, driven by acetaldehyde accumulation, inflammatory cytokines, dehydration, and sleep disruption; a hangover does not indicate ongoing intoxication but reflects alcohol’s metabolic aftermath.

Does Binge Drinking Increase Risk of Alcohol Use Disorder?

Binge drinking patterns, defined by NIAAA as consuming enough alcohol to raise BAC to 0.08% or higher within approximately 2 hours, serve as the primary behavioral antecedent to Alcohol Use Disorder (AUD) development in adolescents and young adults, accelerating the neuroadaptive changes in GABA, glutamate, and dopamine signaling that underlie physiological dependence.

Genetic and Neurobiological Risk Factors

• ADH1B genetic variants: Polymorphisms in the alcohol dehydrogenase gene ADH1B significantly moderate AUD risk; the ADH1B*2 variant, present in over 90% of East Asian populations but fewer than 5% of Europeans, metabolizes ethanol 30 to 40 times faster than the reference allele, producing aversive acetaldehyde accumulation that reduces AUD risk by 60 to 80% in carriers.
• GABA receptor downregulation: Repeated heavy drinking downregulates GABA-A receptor sensitivity through receptor internalization, meaning larger amounts of alcohol are required to produce the initial euphoric effects; this neuroadaptive tolerance drives escalating consumption that can progress from binge drinking to physical dependence.
• Family history: Individuals with a first-degree relative with AUD carry a 3- to 4-fold elevated risk of developing AUD themselves, reflecting a heritability estimate of 40 to 60% for alcohol dependence established in twin and adoption studies reviewed by Dr. Marc Schuckit at the University of California San Diego.

Screening with the AUDIT

• AUDIT tool: The Alcohol Use Disorders Identification Test (AUDIT), developed by the World Health Organization, is a validated 10-item screening instrument that identifies hazardous drinking (scores 8 to 15), harmful drinking (scores 16 to 19), and probable AUD (scores 20 and above) in primary care and behavioral health settings.
• Relevance for binge drinkers: Individuals who ask “how long does it take to get drunk” in the context of optimizing alcohol intake rather than understanding pharmacology may score in the hazardous drinking range on the AUDIT and benefit from brief motivational intervention before AUD develops.

Alcohol Use Disorder vs. Social Drinking: Key Distinctions

Social or recreational alcohol use differs from Alcohol Use Disorder (AUD) not in the amount consumed per occasion but in the pattern of compulsive use, loss of control, continued use despite negative consequences, and the presence of tolerance and withdrawal that define DSM-5-TR AUD criteria.

The 20-minute rule referenced in the PAA refers to the practice of waiting 20 minutes between drinks to allow BAC to peak and the brain to register satiation before consuming additional alcohol, a harm reduction strategy with modest evidence for reducing total consumption per occasion. This practice addresses pacing within a single drinking session but does not modify the neurobiological trajectory of AUD in individuals who are physiologically dependent on alcohol.

Treatment for Alcohol Use Disorder at Right Choice Recovery

Right Choice Recovery provides comprehensive outpatient treatment for Alcohol Use Disorder in New Jersey, with a continuum of care from Partial Care through outpatient programming that addresses both the neurobiological and psychosocial dimensions of AUD.

Christina Wittkop, MS, LCADC, Executive Director of Right Choice Recovery, explains: “Most people who enter treatment for alcohol use disorder have been using alcohol to regulate emotions, anxiety, or social discomfort for years before they seek help. By the time they come to us, the question isn’t just ‘how much are they drinking?’ It’s what they’re drinking to avoid feeling, and that’s where the clinical work begins.”

Partial Care

• Schedule: Right Choice Recovery’s Partial Care program runs Monday through Thursday, 9:00 AM to 2:00 PM, and Friday, 9:00 AM to 12:00 PM, providing intensive daily programming for individuals who have completed medical detoxification and require high-level support before stepping down to IOP.
• Clinical approach: Partial Care integrates CBT, DBT, Motivational Interviewing, family therapy, art therapy, music therapy, and mindfulness-based techniques, with individual treatment plans developed through DSM-5 guideline-based assessment and ASAM criteria placement.

Intensive Outpatient Program

• Day and evening options: The IOP offers daytime sessions Monday through Friday (9:00 AM to 12:00 PM) and evening sessions Monday through Thursday (6:00 PM to 9:00 PM), accommodating clients who maintain work or family obligations during alcohol use disorder treatment.
• MAT integration: Medication-Assisted Treatment including Vivitrol (injectable naltrexone), which blocks opioid receptors to reduce alcohol cravings and the rewarding effects of alcohol relapse, and Suboxone for co-occurring opioid use disorder, are available within the IOP framework.

Outpatient Program

• Long-term recovery support: Right Choice Recovery’s Outpatient Program (Monday through Friday, 9:00 AM to 10:30 AM or 6:00 PM to 7:30 PM) provides ongoing relapse prevention, coping skill reinforcement, and community reintegration support for clients transitioning from IOP, with aftercare planning individualized to each client’s discharge needs.
• Alumni and peer support: Right Choice Recovery’s alumni program keeps graduates connected to the recovery community through events, peer support, and follow-up services, reinforcing the long-term behavioral changes required to maintain sobriety from AUD.

Frequently Asked Questions

How do I know if I’m drunk or just tipsy?

Tipsy refers to mild alcohol impairment at BAC 0.02% to 0.05%, characterized by reduced inhibition, slight mood elevation, and minimally impaired coordination. Drunk typically describes BAC of 0.06% or higher, with measurable reaction time delays, impaired judgment, and visible coordination problems. Because individual tolerance distorts perceived impairment, your self-assessment of sobriety is unreliable; if you’re questioning whether you’re drunk, you are likely impaired enough to be unsafe to drive.

What are the 7 stages of being drunk?

The NIAAA identifies seven stages based on BAC: subclinical (0.001 to 0.029%), euphoria and disinhibition (0.03 to 0.059%), excitement and mild impairment (0.06 to 0.099%), confusion (0.10 to 0.199%), stupor (0.20 to 0.299%), coma (0.30 to 0.399%), and death (above 0.45%). Each stage represents increasing GABA potentiation and NMDA inhibition in the central nervous system.

What is the 20-minute rule for drinking?

The 20-minute rule is a harm reduction guideline suggesting a 20-minute wait between drinks to allow BAC to peak before deciding whether to consume another drink. Because peak BAC occurs 30 to 90 minutes after ingestion, rapid sequential drinking overestimates tolerated intake. The rule reduces the frequency of overestimating how much more alcohol you can consume without reaching impairment thresholds.

Is it possible to get drunk in 2 hours?

Yes. Four to five standard drinks within two hours can raise BAC to 0.08% or higher in many adults, constituting legal intoxication. On an empty stomach, two to three drinks within an hour can reach the euphoric stage in lighter-weight individuals. The time required to get drunk depends on dose per hour, body weight, sex, food intake, and individual enzyme activity.

How long does alcohol stay in the system after drinking?

The liver eliminates approximately 0.015% BAC per hour. A person who reaches a peak BAC of 0.15% takes approximately 10 hours to return to zero BAC. Urine alcohol testing detects ethanol for 12 to 24 hours after the last drink; breath testing is accurate for 12 to 24 hours; blood testing detects alcohol for up to 12 hours; hair testing can detect alcohol biomarkers for 90 days.

Why does alcohol hit harder on an empty stomach?

On an empty stomach, alcohol passes rapidly from the stomach into the small intestine, where most absorption occurs, and enters the bloodstream within 15 to 20 minutes. Food, particularly fat and protein, delays gastric emptying and slows this transit, reducing peak BAC by 25 to 50% for the same dose. This is why the same number of drinks produces noticeably stronger intoxication on an empty stomach compared to after a full meal.

At what point does drinking become an alcohol use disorder?

Alcohol Use Disorder (AUD) is diagnosed under DSM-5-TR when at least 2 of 11 criteria are met within a 12-month period, including inability to control drinking, continued use despite negative consequences, tolerance, withdrawal, and drinking interfering with obligations. AUD is not defined by the number of drinks per occasion but by the presence of compulsive, uncontrolled patterns of use that cause functional impairment.

Can drinking alcohol be fatal even without overdose?

Yes. Long-term Alcohol Use Disorder produces alcoholic liver disease (including cirrhosis), cardiomyopathy, peripheral neuropathy, Wernicke-Korsakoff syndrome (thiamine deficiency dementia), and cancers of the oral cavity, esophagus, liver, and colorectum. Alcohol withdrawal itself carries a mortality risk in physically dependent individuals who stop abruptly without medical supervision, as tonic-clonic seizures and delirium tremens require emergency intervention.

References

1. National Institute on Alcohol Abuse and Alcoholism. (2023). Rethinking drinking: Alcohol and your health. U.S. Department of Health and Human Services. https://www.niaaa.nih.gov/publications/brochures-and-fact-sheets/rethinking-drinking
2. Substance Abuse and Mental Health Services Administration. (2024). Key substance use and mental health indicators in the United States: Results from the 2023 National Survey on Drug Use and Health. SAMHSA.
3. American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). American Psychiatric Publishing.
4. Edenberg, H. J. (2007). The genetics of alcohol metabolism: Role of alcohol dehydrogenase and aldehyde dehydrogenase variants. Alcohol Research and Health, 30(1), 5–13.
5. Schuckit, M. A. (2014). A brief history of research on genetics of alcohol and other drug use disorders. Journal of Studies on Alcohol and Drugs, Supplement 17, 59–67.
6. World Health Organization. (2001). AUDIT: The alcohol use disorders identification test (2nd ed.). WHO.
7. National Institute on Alcohol Abuse and Alcoholism. (2021). Alcohol facts and statistics. U.S. Department of Health and Human Services. https://www.niaaa.nih.gov/publications/brochures-and-fact-sheets/alcohol-facts-and-statistics