Severe Hypoglycemia: How to Respond to a Low Blood Sugar Emergency

02 Sep 2025

Severe Hypoglycemia: How to Respond to a Low Blood Sugar Emergency Severe hypoglycemia, or critically low blood sugar, is a dangerous condition that r...

Severe Hypoglycemia: How to Respond to a Low Blood Sugar Emergency

Severe hypoglycemia, or critically low blood sugar, is a dangerous condition that requires immediate action. Understanding the causes, recognizing the symptoms, and knowing how to respond effectively can be life-saving, especially for individuals with diabetes. This article provides a comprehensive guide on how to manage a low blood sugar emergency. We'll delve into the symptoms, necessary steps, and preventive strategies to ensure the safety and well-being of those at risk.

Understanding Hypoglycemia: A Critical Overview

Hypoglycemia occurs when the level of glucose (sugar) in your blood drops too low. For most people with diabetes, this means a blood sugar level below 70 mg/dL (3.9 mmol/L). While mild hypoglycemia can often be self-treated with a quick snack or glucose tablets, severe hypoglycemia requires assistance from others. This is because the individual experiencing severe hypoglycemia may be confused, disoriented, or even unconscious, making self-treatment impossible.

What Causes Hypoglycemia?

Several factors can contribute to hypoglycemia, including:

  • Excessive insulin dosage: Taking too much insulin is a common cause, especially in individuals with type 1 diabetes.
  • Skipped or delayed meals: Irregular eating patterns can disrupt the balance between insulin and glucose levels.
  • Intense exercise: Physical activity consumes glucose, and without proper adjustments to medication or food intake, blood sugar can plummet.
  • Alcohol consumption: Alcohol can interfere with the liver's ability to release glucose into the bloodstream.
  • Certain medications: Some medications, besides insulin, can lower blood sugar levels.
  • Kidney or liver problems: These conditions can affect glucose metabolism.

Who is at Risk?

Related reading: Understanding Your A1C A Complete Guide To The Blood Sugar Test

While anyone can experience hypoglycemia, certain groups are at a higher risk:

  • Individuals with type 1 or type 2 diabetes on insulin or certain oral medications.
  • People with a history of frequent or severe hypoglycemia.
  • Those with impaired awareness of hypoglycemia (unable to feel the warning signs).
  • Elderly individuals who may have difficulty managing their diabetes or recognizing symptoms.

Recognizing the Signs and Symptoms of Severe Hypoglycemia

Related reading: Is My Blood Sugar Level Preventing Me From Losing Weight

Identifying the symptoms of severe hypoglycemia is crucial for prompt intervention. The signs can vary from person to person, but common indicators include:

Early Warning Signs

  • Shakiness
  • Sweating
  • Dizziness
  • Hunger
  • Irritability or anxiety
  • Confusion
  • Rapid heartbeat

Symptoms of Severe Hypoglycemia

When blood sugar levels drop significantly, the symptoms become more severe and can include:

  • Confusion or disorientation
  • Difficulty speaking
  • Blurred vision
  • Seizures
  • Loss of consciousness

It's important to note: If someone is exhibiting signs of severe hypoglycemia, it should be treated as an emergency, even if you're unsure.

Step-by-Step Guide: Responding to a Severe Hypoglycemic Episode

Here's a detailed, step-by-step guide on how to respond effectively to a severe hypoglycemic emergency:

Step 1: Assess the Situation

  • Safety first: Ensure the environment is safe for both you and the affected person.
  • Check responsiveness: Try to rouse the individual. Are they conscious and able to respond?

Step 2: Call for Help

  • If the person is unconscious or having seizures, immediately call emergency services (911 in the US, 112 in Europe, 000 in Australia). Do not attempt to give them anything by mouth, as this could cause choking.
  • Provide essential information: When calling emergency services, clearly state that the person is experiencing severe hypoglycemia and is either unconscious or having seizures. Provide your location and any relevant medical history if known.

Step 3: Administer Glucagon (If Available and You Know How)

  • What is Glucagon?: Glucagon is a hormone that raises blood sugar levels by stimulating the liver to release stored glucose. It is typically prescribed to individuals at risk of severe hypoglycemia and is available as an injection or nasal spray.
  • How to Administer Glucagon:
    • Injection: Follow the instructions provided with the glucagon kit. Typically, you'll need to mix the glucagon powder with the liquid solution, then inject it into the thigh, arm, or buttock.
    • Nasal Spray: Insert the nozzle into one nostril and press the plunger to deliver the dose.
  • Important Considerations:
    • Even if the person wakes up after receiving glucagon, it’s essential to monitor them closely and ensure they eat a source of carbohydrates as soon as they are fully alert.
    • Glucagon may cause nausea or vomiting. Position the person on their side to prevent choking if they vomit.
    • Always check the expiration date on the glucagon kit. Expired glucagon may not be effective.

Step 4: If the Person is Conscious and Able to Swallow

  • Give a Quick Source of Sugar: Provide a fast-acting carbohydrate source to raise blood sugar levels quickly. Options include:
    • Glucose tablets: Follow the package instructions. Typically, 3-4 tablets are sufficient.
    • Glucose gel: Squeeze the gel into the person’s mouth, avoiding the back of the throat.
    • Juice: Offer a small glass (4 ounces) of fruit juice (not diet juice).
    • Regular soda: Provide a small can (4 ounces) of regular (non-diet) soda.
    • Hard candies: Offer a few hard candies that can be sucked on (avoid chocolate, as the fat content can slow down sugar absorption).
  • Avoid Fatty Foods: Do not give foods high in fat, such as chocolate or peanut butter, as these can slow down the absorption of glucose.

Step 5: Monitor and Reassess

  • Wait 15 minutes: After giving sugar, wait approximately 15 minutes for the blood sugar to rise.
  • Recheck blood sugar: If the person has a glucose meter, check their blood sugar level to confirm it is rising.
  • Repeat if necessary: If the person does not improve or their blood sugar is still low, repeat the sugar administration process.

Step 6: Provide a Longer-Acting Carbohydrate

  • Once the person is stable and their blood sugar is rising, provide a snack that contains both carbohydrates and protein to help stabilize blood sugar levels for a longer period. Examples include:
    • Crackers with cheese
    • Peanut butter on toast
    • A small sandwich
  • Continue to Monitor: Closely monitor the person for the next few hours to ensure their blood sugar remains stable.

Creating a Hypoglycemia Action Plan

Developing a written hypoglycemia action plan is crucial for individuals at risk. This plan should outline the steps to take in case of low blood sugar, including who to contact, where to find glucagon, and what to do if the person becomes unconscious. Share this plan with family members, friends, coworkers, and school personnel.

Here's a template for a hypoglycemia action plan:

| Section | Details | |------------------|-----------------------------------------------------------------------------------------| | Personal Information | Name, Date of Birth, Medical Conditions (e.g., Diabetes), Allergies | | Emergency Contacts | Primary Contact Name & Number, Secondary Contact Name & Number, Physician's Name & Number | | Usual Blood Sugar Range| Target Blood Sugar Levels | | Symptoms of Hypoglycemia| List of Early and Severe Symptoms Specific to the Individual | | Action Plan | Steps to Take for Mild, Moderate, and Severe Hypoglycemia | | Glucagon Information| Location of Glucagon Kit, Instructions for Administration | | When to Call Emergency Services| Specific Conditions (e.g., Unconsciousness, Seizures) | | Additional Notes | Any other relevant information (e.g., Medication List, Special Instructions) |

Related reading: How To Master Your Diabetic Diet For Optimal A1C Control

Preventing Severe Hypoglycemia: Proactive Strategies

Prevention is always better than cure. Here are some proactive strategies to help prevent severe hypoglycemia:

  • Regular Blood Sugar Monitoring: Check blood sugar levels frequently, especially before meals, after exercise, and at bedtime.
  • Consistent Meal Timing: Eat meals and snacks at regular intervals to maintain stable blood sugar levels.
  • Medication Management: Work closely with your healthcare provider to adjust medication dosages as needed.
  • Carbohydrate Counting: Learn how to count carbohydrates to match insulin doses appropriately.
  • Exercise Planning: Adjust insulin doses or consume extra carbohydrates before, during, or after exercise.
  • Alcohol Awareness: Limit alcohol consumption and always eat food when drinking alcohol.
  • Wear a Medical Alert: Wear a medical ID bracelet or necklace that identifies you as having diabetes and lists any medications you take.
  • Continuous Glucose Monitoring (CGM): Consider using a CGM system, which continuously tracks blood sugar levels and alerts you to potential highs and lows.

The Role of Continuous Glucose Monitoring (CGM)

CGMs have revolutionized diabetes management. These devices provide real-time blood sugar readings and can alert users when their blood sugar is dropping too low. This can help prevent severe hypoglycemia by allowing for timely intervention. Studies have shown that CGM use is associated with a significant reduction in hypoglycemic events.

Debunking Common Myths About Hypoglycemia

There are several misconceptions about hypoglycemia that can lead to inappropriate responses. Let's address some common myths:

  • Myth: You should give someone with hypoglycemia insulin. Fact: Insulin lowers blood sugar. Giving insulin to someone with hypoglycemia will only worsen the condition.
  • Myth: Any sweet food will work to treat hypoglycemia. Fact: While sugary foods are helpful, fatty foods like chocolate can slow down sugar absorption.
  • Myth: Once someone recovers from hypoglycemia, they are fine. Fact: It's crucial to monitor the person closely for several hours to ensure their blood sugar remains stable.
  • Myth: People with hypoglycemia always know when their blood sugar is low. Fact: Some individuals develop hypoglycemia unawareness, making it difficult to recognize the warning signs.

Conclusion: Empowering Yourself and Others to Respond Effectively

Severe hypoglycemia can be a frightening experience, but with the right knowledge and preparation, you can respond effectively and potentially save a life. Understanding the causes and symptoms, knowing how to administer glucagon, and developing a hypoglycemia action plan are crucial steps. By empowering yourself and educating those around you, you can minimize the risks associated with low blood sugar emergencies and ensure the safety and well-being of individuals at risk. Remember, timely intervention is key, and every second counts in managing severe hypoglycemia.