Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/29/2025

Insulin Therapy Management

Introduction to Insulin Management

  • The American Diabetes Association recommends that patients should never discontinue insulin therapy based on a single normal blood glucose reading, as this can lead to dangerous hyperglycemia, diabetic ketoacidosis, and increased morbidity and mortality 1, 2

Importance of Continuous Insulin Therapy

  • Insulin requirements fluctuate daily based on multiple factors including food intake, physical activity, stress, illness, and hormonal changes, making a single normal reading insufficient to determine ongoing insulin needs 1
  • During illness, it is especially important that insulin be continued even if the patient is unable to eat or is vomiting, as insulin needs often increase during illness despite decreased food intake 1, 2
  • Discontinuing insulin can rapidly lead to hyperglycemia and potentially diabetic ketoacidosis in patients with Type 1 diabetes, which is a life-threatening condition 2

Patient Education and Management

  • The American Diabetes Association emphasizes that self-monitoring of blood glucose (SMBG) should be used to adjust insulin dosage, not to determine whether insulin should be taken at all 1
  • Normal blood glucose readings indicate that the insulin therapy is working effectively, not that it's no longer needed 1, 3
  • Insulin dosing may need adjustment based on patterns of blood glucose readings over multiple days, not single readings 1

Special Patient Populations

  • For patients with Type 1 diabetes, the American Diabetes Association explains that insulin is absolutely necessary for survival regardless of blood glucose readings 1, 3
  • For elderly patients, while hypoglycemia prevention is important, discontinuing insulin entirely is not the solution - dose adjustment is the appropriate approach 5

Follow-up and Education

  • The American Academy of Family Physicians recommends scheduling a follow-up appointment within 1-2 weeks to review blood glucose patterns and adjust insulin dosing if needed 7
  • Consider referral to diabetes education if the patient demonstrates knowledge gaps about insulin management 6
  • Document the incident and education provided to ensure continuity of care with other healthcare providers 4