If you have diabetes and you’re wondering whether you can enjoy a beer at a barbecue, a glass of wine at dinner, or a cocktail at a wedding, the short answer is usually yes, but with a little planning. Depending on the type of alcohol, it may increase and lower your blood sugar, and that swing can last far longer than the buzz.
This guide covers what alcohol does to your blood sugar, how much is reasonable, the safest picks, medication interactions, and how to plan a night out so that it doesn’t end in hypoglycemia.
Table of Content
Can people with diabetes drink alcohol?
Most people with diabetes can drink alcohol in moderation, with a few exceptions that we will discuss later. The general guidelines differ across different regions and organizations. For example, Diabetes Australia suggests having no more than ten standard drinks per week for both men and women while the American Diabetes Association recommends one drink a day for women and up to two per day for men.
How alcohol affects blood sugar
The empty-stomach hypoglycemia risk
When you drink without eating, alcohol interferes with your liver’s ability to release glucose into the bloodstream, which can lead to hypoglycemia (low blood sugar). It can lead to symptoms such as dizziness, confusion, and, in severe cases, loss of consciousness. This happens because the liver normally helps keep blood sugar steady between meals, and even modest amounts of alcohol can interfere with that process.
The risk of hypoglycemia is even higher if you take insulin, sulfonylurea, or meglitinide since these medications are also lowering your blood glucose. Therefore, if you have diabetes, it is best to avoid drinking alcohol on an empty stomach.
Why some drinks raise blood sugar after a meal
Beer, sweet wines, sangria, sweet cocktails, and pre-mixed drinks contain carbohydrates and sugars that can raise blood glucose levels, much like other carbohydrate-rich foods. Distilled spirits on their own contain almost no carbs, but the mixers such as regular soda, fruit juice, simple syrup, and tonic water often do. Whether your post-meal blood glucose level increases, stays stable, or drops after drinking depends on the type of drink, what you eat alongside it, and the medications you take.
The 24-hour hypo window
Alcohol’s effect on glucose can persist long after the last drink. As Diabetes UK notes, hypoglycemia after drinking can occur overnight or even the next day, especially after heavy drinking or skipped meals. Checking your blood glucose at bedtime and again the next morning is especially important if you take insulin or a sulfonylurea.
When drinking goes beyond moderate
While acute hypoglycemia often gets the most attention, regular heavy drinking can also raise blood pressure and triglyceride levels and may affect long-term glucose control over time. It can worsen diabetic neuropathy and increase the risk of pancreatitis, liver disease, certain cancers, and cardiovascular disease. The effects of alcohol can accumulate over the years, which is why many health organizations recommend limiting alcohol intake.
How much alcohol is safe for people with diabetes?
The harder question is how to drink without disrupting glucose control. Frequency and quantity both matter, and regularly saving up several drinks for one night can significantly increase the risk of hypoglycemia, especially if you also take glucose-lowering medications. Both the ADA’s Standards of Care and the 2020–2025 Dietary Guidelines emphasize moderation and note that “less is better.”
Alcohol also adds calories with little nutritional value. Since the body metabolizes alcohol before fat, excess drinking can contribute to weight gain and make glucose control even more difficult. Alcohol may also reduce leptin, which is a hormone that helps signal fullness, and it can make late-night snacking more likely.
What is a "standard drink"?
Standards vary across different countries. In the article, we would look into those of the U.S and Australia.
In the US, one standard drink contains 14 grams of pure alcohol, according to the National Institute on Alcohol Abuse and Alcoholism (NIAAA). That’s roughly equivalent to:
- 12 fl oz (355 mL) of regular beer (5% ABV)
- 5 fl oz (150 mL) of wine (12% ABV)
- 1.5 fl oz (45 mL) of 80-proof spirits (40% ABV)
In Australia, the Department of Health defines one standard drink as 10 grams of pure alcohol. AU equivalents are approximately 285 mL of full-strength beer (4.8% ABV), 100 mL of wine (13.5% ABV), or 30 mL of spirits (40% ABV).
Because the definition varies by region, you should count by your local standard, and remember that real-world pours are often larger than a standard drink. A “glass” of wine at home or in a restaurant frequently runs 150–200 mL (5–7 oz), and craft beer commonly hits 7–9% ABV. Both pack more alcohol than the standard drink they’re meant to represent.
The safest alcohol picks for people with diabetes
Some drinks have milder effects on blood sugar than others. The biggest variables are carbohydrate content (which raises glucose), alcohol content (which can lower it), and what’s mixed in.
|
Drink type |
Typical serving |
ABV |
Calories |
Carbs |
Glucose impact |
|---|---|---|---|---|---|
|
Light beer |
12 fl oz (355 mL) |
~3.5–4% |
~100 |
3–6 g |
Modest rise |
|
Regular beer |
12 fl oz (355 mL) |
~5% |
~150 |
12–15 g |
Noticeable rise |
|
Dry red or white wine |
5 fl oz (150 mL) |
~12–13% |
~120 |
3–4 g |
Minimal rise |
|
Dessert / sweet wine |
3.5 fl oz (100 mL) |
~14–18% |
~165 |
12–14 g |
Significant rise |
|
Spirits, neat |
1.5 fl oz (45 mL) |
~40% |
~95 |
0 g |
Risk of late drop |
|
Spirit + diet/zero mixer |
varies |
varies |
~95 |
0–1 g |
Low |
|
Sweet cocktail (margarita, piña colada) |
7 fl oz (200 mL) |
~10–15% |
250–300 |
25–45 g |
Big rise then drop |
Beer
Light beers (around 3–6 g of carbs per 12 fl oz / 355 mL) are the easier pick. Standard lagers and ales sit closer to 12–15 g, and craft IPAs commonly carry both more carbs and double the calories of mainstream lagers. Cider falls into the higher-carb camp where most ciders run 12–18 g of carbs per 12 fl oz / 355 mL, similar to a regular beer.
Wine
Dry red and dry white wines are reasonable choices at roughly 3–4 g of carbs per 5 fl oz / 150 mL pour. Brut or extra-dry sparkling wine is similarly low in sugar. Skip dessert wines, port, sherry, and most rosés labelled “sweet.”
Distilled spirits
Vodka, gin, rum, whiskey, and tequila contain almost no carbohydrates. The risk lives in the mixer. Choose seltzer or soda water, sugar-free tonic, diet ginger ale, or a squeeze of citrus over juice, regular soda, or pre-mixed sour mixes.
Drinks to skip
Cream liqueurs, dessert wines, sweet sherry and port, and pre-mixed canned cocktails are typically high in sugar. The so-called “diabetic” or “low-alcohol” beers and wines can also be misleading. As Diabetes UK warns, low-alcohol wines often contain more sugar than standard ones, and “diabetic beers” sometimes carry more alcohol.
Drinking alcohol with diabetes medications
The interaction between alcohol and your diabetes medications matters more than the drink itself. This is where the alcohol and hypoglycemia conversation gets specific.
Insulin
Alcohol amplifies insulin’s glucose-lowering effect. Don’t reduce your basal or correction dose to “make room” for drinking. This could make lows turn severe. Check before bed and again in the morning, and keep a slow-carb snack ready if you’re experiencing symptoms of hypoglycemia.
Sulfonylureas and meglitinides
Glibenclamide (also called glyburide), gliclazide, glimepiride, glipizide, and repaglinide all increase the risk of hypoglycemia, and alcohol stacks on top of that risk. Eat first, eat enough, and never skip a meal you’ve already dosed for.
Metformin
Moderate drinking on metformin is generally fine. Heavy or binge drinking is not since the combination raises the small but serious risk of lactic acidosis. Talk to your doctor if you’re heading into an event with heavy drinking planned.
Other classes
DPP-4 inhibitors and GLP-1 receptor agonists (e.g. Ozempic, Trulicity) carry a lower hypo risk on their own, but alcohol can still trigger lows when these are combined with insulin or a sulfonylurea. SGLT2 inhibitors (e.g. Jardiance, Forxiga) deserve extra caution: alcohol-related dehydration can heighten the rare risk of diabetic ketoacidosis. Talk to your diabetes care team after a severe low, repeated nighttime drops, or a planned heavy-drinking event.
Using a CGM device when you drink
A continuous glucose monitoring (CGM) device is a small wearable sensor that tracks your blood glucose levels in real time without requiring finger pricks every few hours. Wearing one while you drink is one of the most reliable ways to spot a developing hypo before it becomes serious. It is especially important during the night and into the next morning, when alcohol’s delayed effect is hardest to feel. Set your low alarm a little tighter than usual, share your data with someone you trust, and act on the trend arrow, not just the number.
A practical playbook for safer drinking
There are a few things that you can do at different times of the drinking journey. We’ll discuss them one by one below.
A practical playbook for safer drinking
To keep you blood sugar in range and avoid hypoglycemia, you can do the following before you drink:
- Have a balanced meal that includes proteins, fibers, carbohydrates, and fat
- Take your medications on your usual schedule unless your doctor has said otherwise
- Check your blood sugar
- Carry fast-acting glucose (juice, candy, jelly beans) in case of hypoglycemia
- Tell at least one person you’ll be with that you have diabetes and what a low looks like.
While you're drinking
- Pace at no more than one standard drink per hour
- Alternate alcoholic drinks with water or low carb drinks
- Pour your own drinks when you can
- Snack as you go if you’re dancing or otherwise active
- Hypoglycemia can look a lot like being drunk. Symptoms include confusion, slurred speech, unsteadiness, so anyone with you should know to test before assuming it’s just the alcohol.
Before bed and the morning after
It is important to check your blood sugar before bed. If your reading is below 100 mg/dL (5.6 mmol/L) or trending down, have some slow-acting carb like peanut butter, whole-grain toast or dairy products like Greek yogurt.
It’s also important to stay hydrated and don’t skip breakfast. Hangover symptoms, such as fatigue, shakiness, brain fog, can mask hypoglycemia. If you take insulin, don’t bolus aggressively the next morning. The alcohol tail can persist for hours.
The bottom line
Most people with diabetes can drink in moderation if they plan around it. Three things matter more than the rest:
-
- never drink on an empty stomach
- know how your medications interact with alcohol
- monitor your blood sugar in the next 24 hours.
Talk to your care team about your specific situation, especially if you take insulin or a sulfonylurea. With a little planning, a glass with friends doesn’t have to mean a hypo at 3 a.m.
This article is for general information and does not replace personalized medical advice from your healthcare provider. Talk to your doctor, dietitian, or diabetes educator about how alcohol fits into your specific care plan.
Sources
- American Diabetes Association — Alcohol and Diabetes — diabetes.org
- American Diabetes Association — Standards of Care in Diabetes 2024 — diabetesjournals.org
- Diabetes Australia — Living with diabetes: alcohol — diabetesaustralia.com.au
- Diabetes UK — Alcohol and diabetes — diabetes.org.uk
