Glucagon Should Be Prescribed to Patients on High-Risk Diabetes Medications
Glucagon should be prescribed to patients taking insulin or sulfonylureas who are at high risk for severe hypoglycemia, not to all patients on any antidiabetic medication. The key distinction is identifying which medications actually carry significant hypoglycemia risk and which patients are truly at high risk for severe episodes.
Which Medications Warrant Glucagon Prescribing?
The primary high-risk medications are:
- Insulin (all formulations)
- Sulfonylureas (SU)
These are the medications specifically highlighted in the 2023 Endocrine Society guidelines as placing patients at higher risk for hypoglycemia 1. The FDA labeling confirms glucagon is indicated for "insulin coma or insulin reaction resulting from severe hypoglycemia" 2.
Other diabetes medications (metformin, DPP-4 inhibitors, SGLT2 inhibitors, GLP-1 agonists) carry minimal to no hypoglycemia risk when used alone and do not warrant routine glucagon prescribing.
Who Qualifies as "High Risk"?
Not every patient on insulin or sulfonylureas needs glucagon. The 2023 Endocrine Society guideline made a strong recommendation for glucagon preparations that don't require reconstitution for managing severe outpatient hypoglycemia in adults and children at high risk 1.
High-risk features include:
- History of severe hypoglycemia requiring assistance
- Impaired awareness of hypoglycemia
- Frequent hypoglycemic episodes
- Young children unable to recognize or treat their own hypoglycemia
- Elderly patients with cognitive impairment
- Patients with erratic eating patterns or alcohol use
- Those with aggressive glycemic targets (HbA1c <7%)
The Reality of Current Practice
Real-world data reveals significant under-prescribing. In one federally qualified health center study, only 4.4% of patients on high-risk medications had active glucagon prescriptions, and even among those with documented hypoglycemia, only 13.8% were prescribed glucagon 3. Another large health system study found only 22.4% of high-risk adults were prescribed glucagon 4.
Critical Caveats
Glucagon only works if the patient has adequate liver glycogen stores 2. It is ineffective in:
- States of starvation
- Adrenal insufficiency
- Chronic hypoglycemia
- Severe liver disease
In these situations, intravenous or oral glucose is required instead 2.
Warning: Patients in coma from severe hyperglycemia (not hypoglycemia) will not respond to glucagon and require immediate medical attention 2. This is why confirming hypoglycemia when possible is important.
Practical Implementation
The newer glucagon formulations (nasal glucagon, pre-filled auto-injectors like Gvoke HypoPen, and dasiglucagon) are strongly preferred over traditional reconstitution kits 1. The traditional kits have a complicated preparation process that often results in incomplete or aborted administration in emergencies 5, 6.
Key counseling points:
- Family members must be trained before an emergency occurs 2
- After glucagon administration, feed the patient fast-acting sugar (juice, regular soda) followed by long-acting carbohydrates (crackers with cheese, sandwich) as soon as they can swallow 2
- If no response within 15 minutes, give another dose and call emergency services immediately 2
- Turn unconscious patients on their side to prevent choking from vomiting 2
Bottom Line Algorithm
- Is the patient on insulin or sulfonylureas? If no → glucagon not routinely needed
- If yes, do they have high-risk features? (see list above) If no → consider based on individual circumstances
- If yes → prescribe glucagon using newer formulations that don't require reconstitution
- Ensure proper training of patient and household members on administration
- Reassess need if medications change or hypoglycemia risk decreases
The evidence strongly supports targeted prescribing to those truly at risk rather than blanket prescribing to all patients on any diabetes medication 1, 2.