--- title: Diabetes: low blood sugar — what to do — InCaseMap description: Hypoglycaemia in diabetes: give 15–20 g of glucose or a sugary drink, repeat if no improvement after 15 minutes. Unconscious — nothing by mouth. Based on ERC 2025. url: https://incasemap.com/en/first-aid-low-blood-sugar updated: 2026-10-16 language: en publisher: InCaseMap --- > Index of all pages on this site: https://incasemap.com/en/llms.txt — start there to find other pages. # Diabetes: low blood sugar — what to do First aid · Illness and conditions Hypoglycaemia in diabetes: give 15–20 g of glucose or a sugary drink, repeat if no improvement after 15 minutes. Unconscious — nothing by mouth. Based on ERC 2025. Prepared by the [InCaseMap team](https://incasemap.com/en/about) · Steps translated from the Lithuanian text checked 5 October 2026 · Updated 16 October 2026 > **In short:** If a person with diabetes suddenly becomes weak, sweaty, shaky or acts as if drunk, sit them down. If they are conscious and can swallow, give 15–20 g of glucose tablets, a handful of sweets or 50–100 ml of juice or a sugary drink. No improvement after 15 minutes — give it again; improved — let them have a snack. Unconscious — call 112. All 38 first-aid instructions, based on state-institution and international guidelines (Lithuanian Ministry of Health, NVSC, VVKT, ERC, IFRC), are in the InCaseMap app and work offline — together with a map of hospitals, pharmacies and shelters. ## How to recognise it A person with diabetes suddenly becomes weak, sweaty, shaky, confused, angry or acts as if drunk. ## What to do 1. Sit them down. 2. Conscious and able to swallow – 15–20 g of glucose tablets; if there are none – a handful of sweets or 50–100 ml of juice or a sugary (not diet) drink. 3. No improvement after 15 minutes – give it again. 4. Improved – let them have a snack. 5. For a conscious child who will not swallow – half a teaspoon of sugar under the tongue. 6. Call 112 if they lose consciousness or do not improve. ## What not to do - Do not give anything by mouth to an unconscious person – they would choke. **First aid, a map and community — in one app.** 38 situations based on state-institution and international guidelines, hospitals, pharmacies and shelters on the map, a family group and local communities. Every place stays on your phone, even offline. [Get InCaseMap](https://incasemap.com/en/download) · [Hospitals and pharmacies on the map](https://incasemap.com/en/categories#sveikata) ## Frequently asked questions ### What can I give if there are no glucose tablets? A handful of sweets or 50–100 ml of juice or a sugary (not diet) drink. ### Should I give food to an unconscious person? No. Do not give anything by mouth to an unconscious person — they would choke. Call 112. ## Sources - [European Resuscitation Council Guidelines 2025: adult and paediatric resuscitation, first aid. Resuscitation 2025; 215](https://doi.org/10.1016/j.resuscitation.2025.110770) doi.org - [Resuscitation Council UK — 2025 resuscitation guidelines](https://www.resus.org.uk/about-us/news-and-events/rcuk-publishes-guidelines-2025) resus.org.uk - [IFRC International First Aid, Resuscitation and Education Guidelines 2020](https://www.ifrc.org/sites/default/files/2022-02/EN_GFARC_GUIDELINES_2020.pdf) ifrc.org Based on: European Resuscitation Council (ERC), Resuscitation Council UK, International Federation of Red Cross and Red Crescent Societies (IFRC). Translated from the Lithuanian text checked 5 October 2026. Call 112 first and do what the operator says — their instructions come before this page; do not hang up until they tell you to. This page does not replace first-aid training. You may freely use this text and its data, commercially too — just add a link: `InCaseMap` ([more](https://incasemap.com/en/reuse-and-citation)) ## Related - [Fainting](https://incasemap.com/en/first-aid-fainting) - [Recovery position](https://incasemap.com/en/first-aid-recovery-position) - [Seizures](https://incasemap.com/en/first-aid-seizure)