If a person with diabetes becomes shaky, sweaty or confused, use the 15-gram/15-minute rule only if they can safely swallow
The source recommends 15 grams of sugar, such as sugar cubes or juice, then rechecking after 15 minutes and repeating if glucose remains low. Below 3.0 mmol/L is clinically significant hypoglycemia. Episodes requiring another person's help can be fatal. Do not feed anyone with impaired consciousness: aspiration is dangerous; call China's 120.
What it takes
No additional cost beyond carrying sugar cubes or a small juice carton.
What you may gain
Glucose below 3.0 mmol/L is clinically significant hypoglycemia. Altered mental or physical status requiring assistance defines severe hypoglycemia, which can be fatal.
Context & considerations
Give nothing by mouth when consciousness is impaired; call 120. The same standard recommends prescribed glucagon for everyone using insulin or at high risk of hypoglycemia. Nasal and ready-to-use injectable products are easier than those requiring mixing. These preparations, including carried sugar, are primarily intended for you or a family member with diabetes.
Research & references
American Diabetes Association (2025). Standards of Care in Diabetes—2025, section 6: Glycemic Goals and Hypoglycemia. Diabetes Care. Level 1: glucose <70 mg/dL (<3.9 mmol/L) and ≥54 mg/dL (≥3.0 mmol/L); level 2: <54 mg/dL (<3.0 mmol/L); level 3: altered mental/physical status requiring assistance, regardless of measured glucose. For most individuals, ingest 15 g carbohydrate and repeat after 15 minutes if hypoglycemia persists. https://doi.org/10.2337/dc25-S006