Understanding Hypoglycemic Emergencies and the Role of Glucagon

Severe hypoglycemia occurs when blood glucose levels fall below 54 mg/dL (3.0 mmol/L) and the person cannot self-treat because of altered consciousness, seizure, or inability to swallow. In these situations, glucagon is the only rescue medication that can rapidly raise blood sugar without requiring the person to eat or drink. Glucagon works by stimulating the liver to convert stored glycogen into glucose, which is then released into the bloodstream. For people with diabetes—especially those using insulin or sulfonylureas—having a glucagon kit available and knowing how to use it can mean the difference between a quick recovery and a prolonged medical crisis.

Despite its life-saving potential, many caregivers and even healthcare providers are not fully comfortable administering glucagon. This article provides a comprehensive, step‑by‑step guide to using glucagon kits effectively, from preparation through post‑injection care. It also covers important precautions, training recommendations, and common mistakes to avoid.

What Is a Glucagon Kit?

A glucagon emergency kit contains a sterile, lyophilized powder of glucagon hydrochloride and a separate syringe or vial of sterile diluent (usually sterile water). The two components must be mixed immediately before use. Glucagon is a hormone naturally produced by the pancreas; in a rescue scenario, it triggers the liver to release glucose rapidly. Most kits are designed for intramuscular (IM) or subcutaneous (SC) injection, though some newer formulations are available as nasal powder.

Types of Glucagon Kits

  • Injectable glucagon kits: The traditional kit requires mixing and drawing up the solution. Examples include GlucaGen® and the generic glucagon kit. These are widely available and covered by most insurance plans.
  • Nasal glucagon (Baqsimi®): A needle‑free, single‑use device that delivers glucagon powder into the nasal cavity. It is easier to administer in an emergency and does not require mixing. Nasal glucagon is especially helpful for caregivers who are uncomfortable with injections.

Both formulations are equally effective when used correctly. The choice often depends on cost, availability, and the comfort level of the person who will be administering the dose.

Storage and Expiration

Glucagon kits must be stored at room temperature (between 68°F and 77°F / 20°C and 25°C) and protected from light and moisture. Do not refrigerate or freeze, as this can damage the medication. Always check the expiration date printed on the box and on the vial. Expired glucagon may lose potency and should be replaced immediately. It is a good practice to rotate kits every few months and to keep a spare kit at home, in the car, or at a workplace or school.

Recognizing When to Use Glucagon

Not all low blood sugar requires glucagon. Mild hypoglycemia (blood glucose 54–69 mg/dL) can usually be treated with fast‑acting carbohydrates such as juice, glucose tablets, or candy. Severe hypoglycemia is defined by the inability to take oral carbohydrates due to unconsciousness, seizure, extreme confusion, or combativeness. Use glucagon immediately if the person:

  • Is unconscious or unresponsive.
  • Is having a seizure.
  • Cannot swallow or is too confused to eat or drink safely.
  • Has a blood glucose reading <54 mg/dL and is deteriorating rapidly.

When in doubt, it is safer to administer glucagon than to wait for help. Delaying treatment increases the risk of brain damage or death.

Step‑by‑Step Instructions for Using an Injectable Glucagon Kit

Before an emergency occurs, review these steps with all household members, babysitters, coworkers, and anyone who regularly spends time with the person at risk. Practice with a training kit (available from some diabetes organizations) to build muscle memory.

Step 1: Gather the Kit and Prepare the Area

  • Remove the kit from its packaging. Confirm the medication has not expired and the solution is clear (no discoloration, particles, or leaks).
  • Wash your hands if possible, or use hand sanitizer. In an emergency, speed is more important than sterile technique—do not delay.
  • Position the person on their side (recovery position) to prevent choking if they vomit. Do not place anything in their mouth.

Step 2: Mix the Solution

  • Remove the cap from the vial of powder. Remove the protective cover from the syringe needle.
  • Inject the entire volume of diluent into the vial using the syringe. Do not invert the vial yet.
  • Swirl the vial gently until the powder is completely dissolved. Do not shake vigorously, as foaming can make it difficult to draw the solution. The mixture should be clear and colorless.

Step 3: Draw the Solution into the Syringe

  • Turn the vial upside down. Withdraw the plunger to pull all of the reconstituted solution into the syringe. Remove any air bubbles by gently tapping the syringe and pushing the plunger slightly to expel air.
  • Replace the needle cover carefully if you need to move to another location. More commonly, you will administer immediately.

Step 4: Choose the Injection Site and Administer

  • The preferred injection site is the outer mid‑thigh (vastus lateralis muscle) or the upper outer quadrant of the buttocks (gluteal muscle). In thin individuals, the anterolateral thigh provides good muscle access.
  • Clean the injection site with an alcohol swab if available. Insert the needle at a 90‑degree angle (straight in). For children or very thin adults, you may pinch a fold of skin to ensure the injection goes into muscle, not fatty tissue.
  • Inject the solution slowly and steadily over about 10–15 seconds. Withdraw the needle and apply gentle pressure with gauze or a clean cloth for a few seconds—do not rub.

Step 5: After the Injection – Monitoring and Post‑Care

  • Turn the person onto their side if they are not already in the recovery position. Vomiting is common after glucagon administration; this position protects the airway.
  • Look for signs of recovery: The person usually becomes responsive within 5–15 minutes. They may be confused, irritable, or disoriented initially. Reassure them calmly.
  • Check blood glucose as soon as possible after they awaken. If the person remains unconscious after 15 minutes, a second dose of glucagon is safe to administer (if another kit is available). However, always call 911 or emergency services—do not rely solely on a second dose.
  • Offer oral carbohydrates once fully awake: Even after glucagon, blood sugar may drop again. Give juice, glucose tabs, or a snack containing both carbohydrates and protein (e.g., crackers with peanut butter).

Important Considerations After Glucagon Administration

Side Effects and Safety

Glucagon is extremely safe and has few contraindications. The most common side effects are nausea and vomiting (especially if the injection is given too quickly). Other possible effects include headache, dizziness, and temporary tachycardia. Allergic reactions are rare but possible; watch for hives, difficulty breathing, or swelling of the face or throat. Glucagon should not be used in patients with known pheochromocytoma or insulinoma, but in an emergency, the benefit outweighs the risk.

When to Call Emergency Services

Always call 911 (or your local emergency number) immediately after administering glucagon, even if the person recovers. They may need monitoring for recurrent hypoglycemia, seizure complications, or aspiration. Do not assume everything is fine just because they wake up. Emergency medical personnel can assess and transport if necessary.

If the person does not regain consciousness within 15 minutes, give a second dose if available, and continue rescue breathing if they are not breathing. EMTs can provide additional glucagon and intravenous dextrose.

Training and Emergency Preparedness

Formal training in glucagon administration should be offered to all caregivers, including family members, school nurses, coaches, and coworkers. Many diabetes clinics and hospitals provide free training using placebo kits. The American Diabetes Association and the American Association of Clinical Endocrinology also offer online resources and videos. The American Diabetes Association’s glucagon guide provides a downloadable visual summary.

In addition to hands‑on practice, create an emergency action plan that includes:

  • Where the glucagon kit is stored (label the location on the refrigerator or in a designated cabinet).
  • Emergency contact numbers for the person’s healthcare provider and local emergency services.
  • Instructions for bystanders (e.g., “Call 911, then give glucagon”).
  • A list of the person’s diabetes medications, doses, and any allergies.

Everyone involved should review the plan at least twice a year, especially if the kit expires or the person’s medication regimen changes.

Special Populations: Children, Elderly, and Pregnant Women

Children

Glucagon dosing for children is weight‑based. Injectable kits are available in 1 mg doses; for children under 25 kg (55 lbs), use half of the reconstituted dose (0.5 mg). Some kits include a separate dose‑marking system. Nasal glucagon is approved for adults and children aged 4 years and older; the dose is fixed (3 mg) and does not need adjustment. Parents should practice using a training device with their child’s school nurse.

Elderly Individuals

Older adults may have comorbid conditions such as renal impairment or cardiovascular disease. Glucagon is still safe, but they may be more prone to nausea and vomiting. Additionally, they may take multiple medications that affect blood sugar or interact with glucagon (e.g., beta‑blockers can mask hypoglycemia symptoms). Post‑recovery, they need close monitoring for recurrent hypoglycemia and falls.

Pregnancy

Severe hypoglycemia during pregnancy can harm both mother and fetus. Glucagon does not cross the placenta in significant amounts and is considered safe. Injectable glucagon is preferred, as nasal glucagon’s safety in pregnancy has not been extensively studied. Pregnant women with type 1 or type 2 diabetes should have glucagon available and a clear emergency plan.

Common Mistakes and How to Avoid Them

  • Not mixing properly: In a panic, people may fail to dissolve the powder completely or may inject the diluent without mixing. Always swirl gently until clear.
  • Using an expired kit: Check dates every three months and replace expired kits. Consider setting a recurring calendar reminder.
  • Injecting into a vein or artery: Intramuscular injection is correct. Intravenous administration is possible but requires medical training.
  • Forgetting to call 911: Even after successful revival, professional evaluation is mandatory. Do not skip this step.
  • Mistaking nasal glucagon for injectable: If using Baqsimi, the device is single‑use, pre‑filled, and administered into one nostril—no mixing required. Do not attempt to inject it.

For more detailed visuals and instructions, the Mayo Clinic glucagon guide offers a patient‑friendly overview.

Frequently Asked Questions About Glucagon Kits

Can glucagon be given if I am not sure the person has diabetes?

If the person is unconscious and has known diabetes or an emergency medical ID (bracelet, necklace, or card), give glucagon. If you are uncertain, check their blood glucose if you have a meter; if it is below 70 mg/dL and they cannot swallow, give glucagon. The risk of giving glucagon to someone who is not hypoglycemic is low—the main effect is temporary hyperglycemia and nausea.

Do I need a prescription for a glucagon kit?

In most countries, glucagon is available by prescription only. However, many pharmacies stock it, and some health plans cover it. Ask your healthcare provider for a prescription and fill it even if you are not expecting a crisis. Keep it with you at all times.

Can I use glucagon on a pet with diabetes?

Glucagon is sometimes used in veterinary medicine, but only under a veterinarian’s guidance. The dose and technique are different for dogs and cats. Do not use a human glucagon kit on a pet without specific training.

How long does glucagon last in the body?

Glucagon’s effect is rapid but short‑lived—typically 15–30 minutes. That is why it is crucial to follow up with oral carbohydrates and seek medical help. It is not a substitute for ongoing diabetes management.

Conclusion

Glucagon kits are essential tools for managing severe hypoglycemia, yet they are often underutilized because people are unsure how to use them. By understanding the signs of severe low blood sugar, practicing the mixing and injection steps, and having a clear emergency plan, caregivers can respond with confidence. Whether using an injectable or nasal formulation, the key principles remain the same: act quickly, protect the airway, and call for professional help. Education and preparation transform a glucagon kit from a medical device into a life‑saving intervention. For additional resources, the CDC’s hypoglycemia page provides helpful guidelines.

Share this information with everyone who may be present during a hypoglycemic emergency. A few minutes of training today could make all the difference tomorrow.