What counts as low blood sugar in type 2 diabetes?

Hypoglycemia is low blood glucose. The American Diabetes Association generally uses a level below 70 mg/dL as the threshold at which to take action. Your clinician may set a target range that is specific to you, so it is best to follow their guidance.

How do you treat a mild low blood sugar?

For a mild low, the American Diabetes Association describes the 15-15 approach: take about 15 grams of fast-acting carbohydrate, wait about 15 minutes, then recheck glucose and repeat if it is still low. Follow the specific plan your clinician has given you, and seek emergency help for severe symptoms such as confusion or loss of consciousness.

Type 2 diabetes · safety

Hypoglycemia in Type 2 Diabetes

Q: Which type 2 diabetes medicines can cause hypoglycemia?

Lows are more likely with insulin or sulfonylureas, which actively lower glucose. Metformin and GLP-1 receptor agonists used on their own carry a lower risk of hypoglycemia. If you are unsure which category your medicines fall into, ask your clinician or pharmacist.

6 min read · Updated July 2026

Hypoglycemia — low blood glucose — is an important safety topic in type 2 diabetes. Most low episodes are mild and easily treated, but recognizing them early and knowing what to do makes a real difference. Lows are more common with certain medications, so understanding your own risk is a good first step.

What hypoglycemia means

Hypoglycemia is when blood glucose falls too low to comfortably fuel the body. The American Diabetes Association (ADA) generally treats a level below 70 mg/dL as the point to take action, though your clinician may set a target range specific to you. Not everyone with type 2 diabetes will experience lows, but it helps to know the signs and have a plan. For where this fits in overall care, see the type 2 diabetes guide and our overview of type 2 blood sugar levels.

Who is most at risk

The main driver of hypoglycemia risk is medication. Lows are more likely with insulin or sulfonylureas, because these actively push glucose down. By contrast, metformin and GLP-1 receptor agonists used on their own carry a lower risk of causing hypoglycemia. Other contributors can include skipping or delaying meals, drinking alcohol, or more activity than usual. Our type 2 medications overview explains how these drug classes differ. If you are unsure which category your medicines fall into, ask your clinician or pharmacist.

Recognizing the symptoms

Symptoms can come on quickly and vary from person to person. Common early signs include:

Shakiness or trembling
Sweating
Hunger
A fast or pounding heartbeat
Irritability, anxiety, or difficulty concentrating

As a low becomes more serious, confusion, slurred speech, weakness, or loss of consciousness can occur. Severe hypoglycemia is a medical emergency and needs immediate help.

Treating a mild low: the 15-15 idea

For mild lows, the ADA describes a simple approach often called 15-15: take about 15 grams of fast-acting carbohydrate — for example glucose tablets, a small glass of juice, or regular (non-diet) soda — wait about 15 minutes, then recheck your glucose. If it is still low, repeat. Once glucose is back in range, a small snack or meal may help keep it steady. This is general guidance — follow the specific plan your clinician has given you, including how they want you to handle lows and when to use emergency glucagon if it has been prescribed.

Prevention and when to seek help

Everyday prevention includes eating regular meals, being mindful of activity and alcohol, and checking glucose when appropriate — continuous glucose monitoring can alert some people to trends before a low becomes serious. Talk with your clinician if you have lows often, if they happen without warning symptoms, or if any low is severe. Seek emergency care right away for confusion, seizures, or loss of consciousness. Endobits is clinical decision-support software used under clinician oversight — it helps surface glucose patterns for you and your care team, and does not diagnose or treat.

Spot patterns before they become problems

See how glucose trends and lows show up in your data — context to share with your clinician.

Explore your glucose data

Sources

American Diabetes Association — Hypoglycemia (Low Blood Glucose). Centers for Disease Control and Prevention — Low Blood Sugar (Hypoglycemia). National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) — Low Blood Glucose (Hypoglycemia).

This article is educational and not medical advice. The 70 mg/dL threshold and the 15-15 approach are attributed to the American Diabetes Association and may be updated over time. Follow the personalized plan from your qualified healthcare provider, and seek emergency care for severe low blood sugar. Endobits is clinical decision-support software used under clinician oversight, not a diagnostic device.