Management of Persistent Hypoglycemia in Non-Insulin Users

Immediate Management

The American Diabetes Association recommends administering glucagon 1 mg intramuscularly, subcutaneously, or intravenously (or 3 mg intranasal if available) to patients with persistent hypoglycemia, while simultaneously investigating and addressing the underlying cause of hypoglycemia 1
Critical illness, such as sepsis, severe infection, or shock, is a common cause of hypoglycemia in non-diabetic patients and may be a marker of illness severity 1
Organ failure, including renal disease, liver disease, or heart failure, can also cause hypoglycemia in non-diabetic patients 1
Malignancy, particularly large tumors or insulinomas, is another potential cause of hypoglycemia in non-diabetic patients 1
Malnutrition or altered nutritional state can contribute to hypoglycemia in non-diabetic patients 1
Medication-related hypoglycemia can occur in non-diabetic patients taking sulfonylureas, meglitinides, or other glucose-lowering agents, even if not on insulin 2

Establishing continuous glucose monitoring or frequent bedside glucose checks (every 1-2 hours initially) can help prevent recurrent hypoglycemia 3
Initiating continuous intravenous dextrose infusion (D10 preferred over repeated D50 boluses) can help prevent rebound hyperglycemia 3
Reviewing and discontinuing any potentially causative medications can help prevent iatrogenic hypoglycemia 3, 4
Evaluating for nutrition-insulin mismatch, such as sudden NPO status or interrupted enteral/parenteral feeding, can help prevent hypoglycemia 3, 4

Documenting blood glucose level at the time of hypoglycemia, recent medication administration, nutritional status, and presence of acute kidney injury or critical illness can help identify the underlying cause of hypoglycemia 1, 3, 4
Evaluating for insulinoma or other hormone-secreting tumors, adrenal insufficiency, alcohol use, and accidental or intentional medication ingestion can help identify the underlying cause of hypoglycemia 1, 2, 3, 5

Every hospital should have a hypoglycemia management protocol that includes immediate glucagon availability, mandatory documentation and tracking of all hypoglycemic episodes, root cause analysis for each episode, and automatic treatment regimen review when blood glucose ≤70 mg/dL 1, 3, 4, 5