Written by: Dr. Albana Greca Sejdini, MD, MMedSc
Medically reviewed by: Dr. Ruden Cakoni, MD, Endocrinologist
Last medically reviewed: July 2026
Reader’s original question:
What is the blood sugar level chart in alcoholics?
Medical wording note: “people who drink alcohol” or “people with alcohol use disorder” is more accurate and respectful than “alcoholics.”
Quick Answer: There is no separate blood sugar chart for people who drink alcohol. The usual glucose ranges still apply, but alcohol can make readings less predictable. Carbohydrates in beer, sweet wine, liqueurs and mixers may raise glucose first. Alcohol itself can then reduce the liver’s glucose release and cause a delayed low, especially with insulin, sulfonylureas, little food, exercise or liver disease.
Below 70 mg/dL (3.9 mmol/L):
Low blood sugar; treat promptly according to the diabetes plan.
Below 54 mg/dL (3.0 mmol/L):
Clinically significant low; severe symptoms require emergency help.
Before meals: 80–130 mg/dL:
A common target for many nonpregnant adults with diabetes.
1–2 hours after starting a meal: below 180 mg/dL:
A common after-meal target for many nonpregnant adults with diabetes.
These are general ranges, not personal instructions. A clinician may recommend different targets for someone with recurrent hypoglycemia, liver or kidney disease, malnutrition, pregnancy, advanced age or other medical conditions. For a complete comparison, see the fasting, after-meal and A1C chart.
Pure ethanol does not enter the bloodstream as glucose. The early glucose rise sometimes seen after drinking usually comes from carbohydrates in the beverage or mixer. Beer, cider, sweet wine, liqueurs, juice, regular soda, sweetened tonic and cocktail syrups can raise glucose. Plain distilled spirits generally contain little carbohydrate before mixers, but they still carry alcohol-related risks.
The liver normally releases glucose between meals and overnight. While processing alcohol, it may release less glucose when the body needs it. This can lead to delayed hypoglycemia several hours after drinking, including during sleep. The risk is higher when alcohol is consumed without food, after exercise or with insulin, sulfonylureas or meglitinides.
Alcohol does not produce the same “rise for 20–30 minutes and then crash” in everyone. The response depends on the drink, amount, meal, medicines, activity, liver function and diabetes type. Excessive drinking can also contribute to high glucose through sugary drinks, overeating, dehydration, missed medication and poor sleep. Read the full guide to alcohol and blood sugar highs, delayed lows and safety.
Long-term heavy alcohol use can contribute to fatty liver, alcohol-associated hepatitis and cirrhosis. It can also cause pancreatitis, malnutrition and medicine interactions. These conditions may make glucose regulation more difficult, but they do not create one predictable chart.
Cirrhosis does not automatically cause a permanent glucose reading below 60 mg/dL. A person with advanced liver disease may have low, normal or high glucose depending on food intake, liver reserve, infection, pancreatic function and medicines. Repeated low glucose without diabetes treatment requires medical evaluation.
Current U.S. guidance describes moderation as no more than one standard drink in a day for women or two for men. One U.S. standard drink is approximately 12 oz beer, 5 oz wine or 1.5 oz distilled spirits. These are upper limits, not goals, and less—or none—may be safer. People who do not drink should not start.
Avoid alcohol during pregnancy, with current low glucose or ketones, while vomiting or dehydrated, when unable to monitor safely, or when advised to abstain because of liver disease, pancreatitis, medicines or alcohol use disorder. Someone who drinks heavily every day may need medical help to stop safely because sudden withdrawal can cause seizures or delirium.
If glucose is below 70 mg/dL and the person is awake and able to swallow, stop drinking, take 15 grams of fast-acting carbohydrate, recheck after 15 minutes and repeat if still low. Continue monitoring because the low may return. Follow the steps in the guide to blood sugar between 45 and 69 mg/dL.
Emergency: If the person is unconscious, having a seizure, unable to swallow, breathing slowly or irregularly, repeatedly vomiting or cannot be awakened, call emergency services. Do not give food or drink by mouth. Give glucagon if available and you have been trained to use it. Never assume the person is simply “sleeping it off.”
Medical disclaimer: Educational only—not personal medical advice. Discuss alcohol, glucose monitoring and medicine safety with a qualified healthcare professional.
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