Also Known AsSerum Ethanol Test, Blood Alcohol Concentration Test, BAC Test
Sample TypeBlood (Serum)
Fasting RequiredNo
Report DeliveryWithin 24 hours
Age GroupAll age groups
GenderAll
Test TypeEnzymatic Assay (Alcohol Dehydrogenase Method) / Gas Chromatography
Unitsmg/dL or g/dL
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The Alcohol test is a blood test that measures the concentration of ethanol, the form of alcohol present in alcoholic beverages, in the bloodstream. Also referred to as the serum ethanol test or blood alcohol concentration test, it provides a precise quantitative measurement of alcohol levels in the body at the time of sample collection. Unlike breath-based alcohol screening devices used in roadside testing, the serum ethanol test performed in a clinical laboratory setting is the gold standard for accurate and legally defensible alcohol quantification, offering superior precision and the ability to detect very low concentrations that breath tests may miss.
Ethanol is absorbed rapidly from the gastrointestinal tract into the bloodstream following consumption, reaching peak blood levels within 30 to 90 minutes depending on the quantity consumed, the rate of drinking, food intake, and individual metabolic factors. The liver metabolises ethanol at a relatively fixed rate of approximately 10 to 15 milligrams per decilitre per hour through the action of the enzyme alcohol dehydrogenase, converting it progressively to acetaldehyde and then to acetate. This predictable metabolism means that blood alcohol concentration at a known time after sample collection can be used to estimate the level at an earlier point, which has important clinical and medicolegal applications.
In India, alcohol use disorders are a significant and growing public health concern, with the WHO estimating that India has one of the highest per capita alcohol consumption rates among developing nations. Alcohol-related liver disease, road traffic accidents, domestic violence, and occupational injuries attributable to alcohol intoxication impose a substantial burden on the healthcare system. The test is performed on a small blood sample drawn from a vein and completed in under five minutes.
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Doctors prescribe an Alcohol test in the following situations:
Evaluating acute alcohol intoxication in patients presenting to emergency departments with altered consciousness, confusion, slurred speech, ataxia, and respiratory depression where quantitative blood alcohol measurement guides clinical management, determines the severity of intoxication, and helps exclude other concurrent medical causes of altered mental status.
Investigating alcohol use disorder and monitoring abstinence in patients undergoing treatment for alcohol dependence where serial blood alcohol testing alongside other biomarkers such as GGT, CDT, and MCV provides objective evidence of drinking behaviour and compliance with abstinence requirements during rehabilitation programmes.
Assessing alcohol-related organ damage in patients with suspected alcoholic liver disease, alcoholic pancreatitis, alcoholic cardiomyopathy, and alcoholic neuropathy where confirmation of active alcohol use through blood testing is an essential component of establishing the aetiological relationship between alcohol consumption and end-organ injury.
Medicolegal evaluation in cases involving road traffic accidents, workplace injuries, assault, and suspected driving under the influence where a quantitative serum ethanol measurement provides legally admissible evidence of alcohol intoxication at the time of the incident, forming a critical component of the medicolegal documentation.
Monitoring patients on medications with known dangerous interactions with alcohol including metronidazole, disulfiram, certain antifungals, and anticoagulants where confirming alcohol abstinence before and during treatment prevents potentially severe adverse drug reactions and ensures medication safety.
Evaluating neonates and paediatric patients with unexplained neurological symptoms, metabolic acidosis, or altered consciousness where accidental alcohol ingestion is a differential diagnosis requiring exclusion through quantitative blood alcohol testing alongside other toxicological investigations.
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The Alcohol test measures the concentration of ethanol in the blood serum, expressed in milligrams per decilitre (mg/dL) or grams per decilitre (g/dL). In medicolegal contexts, results may also be expressed as blood alcohol concentration percentage.
The clinically and legally accepted threshold for alcohol intoxication in India for driving purposes is 30 mg per 100 mL of blood as per the Motor Vehicles Act. Clinical impairment typically begins at levels above 50 mg/dL even in regular drinkers.
Negative (Below 10 mg/dL)
A result below 10 mg/dL is considered negative for clinically significant alcohol and indicates either no recent alcohol consumption or complete metabolism of a prior intake. This is the expected result in individuals who have abstained from alcohol and serves as a baseline reference in abstinence monitoring programmes.
Low to Moderate (10 to 100 mg/dL)
Results in this range indicate measurable alcohol presence consistent with recent consumption. Even at the lower end of this range, subtle cognitive and psychomotor impairment begins, and levels above 30 mg/dL exceed the legal driving limit in India. Clinical significance depends on individual tolerance, the clinical context, and the purpose of testing.
High to Severely Elevated (Above 100 mg/dL)
Levels above 100 mg/dL indicate significant intoxication with progressive impairment of coordination, judgement, and consciousness. Levels above 300 mg/dL carry risk of life-threatening respiratory depression, coma, and death, particularly in alcohol-naive individuals and those with concurrent sedative drug use, requiring immediate emergency medical management.
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No fasting is required for the Alcohol test when it is performed for clinical or medicolegal purposes, as the test is specifically designed to measure the actual alcohol concentration present in the blood at the time of collection and dietary status does not affect ethanol levels. In emergency and medicolegal settings, the test is performed immediately regardless of fasting status to capture the blood alcohol level at the most clinically relevant time point.
When the test is being performed for abstinence monitoring or pre-employment purposes rather than acute assessment, inform your doctor about any alcohol-containing medications, tonics, cough syrups, or herbal preparations being consumed, as these can contribute small amounts of ethanol to the bloodstream and may produce a low-level positive result that requires clinical contextualisation.
Inform your doctor about the timing of your last alcoholic drink before the test, as this information is essential for accurately interpreting the result in the context of the rate of ethanol metabolism. If you are being tested as part of an alcohol rehabilitation programme, consistent timing of serial tests and use of the same laboratory platform ensures reliable trend comparison across visits. Staying well hydrated before the blood draw facilitates easier venous access and a smooth collection experience.
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If you are booking through the SecondMedic platform the Alcohol test price in Rajkot can cost you around Rs. 668. You may also consider booking a comprehensive liver function and alcohol biomarker panel that includes serum ethanol alongside GGT, LFT, CDT, and complete blood count for a thorough assessment of alcohol-related health impact at a bundled price on SecondMedic.
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SecondMedic offers convenient home sample collection for the Alcohol test in Rajkot, making it easy to get tested without visiting a diagnostic centre. Home collection is available free of charge for orders above Rs. 300. A trained phlebotomist will visit your preferred address between 7 AM and 10 PM, seven days a week, including Sundays and public holidays. Your blood sample is processed at NABL-accredited partner laboratories, and your report is delivered within 24 hours directly to your WhatsApp and email.
Yes, the Alcohol test is fully available in Rajkot through SecondMedic. You can book online and a trained phlebotomist will collect your sample at home at your preferred time.
The Alcohol test price in Rajkot on the SecondMedic platform is approximately Rs. 668. Prices may vary slightly based on the package selected at the time of booking.
Your Alcohol test report will be delivered within 24 hours of sample collection. Reports are shared directly to your WhatsApp and email for easy and immediate access.
Samples collected in Rajkot are processed at NABL-accredited partner laboratories. This ensures accuracy, reliability, and strict adherence to national diagnostic quality standards.
Yes, home sample collection for the Alcohol test is available in Rajkot. A certified phlebotomist will visit your address at a time slot that is most convenient for you.
Yes, home collection is available seven days a week in Rajkot, including Sundays and public holidays, between 7 AM and 10 PM without any additional charges.
Doctors prescribe this test to evaluate acute intoxication, monitor abstinence in alcohol use disorder treatment, assess alcohol-related organ damage, and provide legally admissible evidence of blood alcohol concentration in medicolegal and occupational health settings.
A result below 10 mg/dL is considered negative for clinically significant alcohol. The legal driving limit in India is 30 mg per 100 mL of blood under the Motor Vehicles Act, and levels above 100 mg/dL indicate significant intoxication.
An elevated blood alcohol level confirms recent alcohol consumption with degree of intoxication proportional to the concentration detected. Your doctor will interpret the result in the context of clinical presentation, timing of last drink, and the purpose of testing to determine appropriate clinical or medicolegal action.
Content Reviewed By
Reviewed by:
Dr. Kovid Pandey
MBBS, General Physician
Last Reviewed: 10th Mar 2026
References
1
World Health Organization: Global Status Report on Alcohol and Health 2018, WHO, 2018
— www.who.int
2
Dasgupta A: Alcohol and Its Biomarkers: Clinical Aspects and Laboratory Determination, Elsevier, 2015
— www.sciencedirect.com
3
Motor Vehicles Act 1988, Section 185: Driving by a Drunken Person or by a Person Under the Influence of Drugs, Government of India
— www.indiacode.nic.in
4
Vonghia L et al.: Acute alcohol intoxication, European Journal of Internal Medicine, 2008
— www.sciencedirect.com
5
MedlinePlus, National Library of Medicine: Ethanol Blood Test, NIH MedlinePlus, 2023
— medlineplus.gov
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