Opioid-Induced Adrenal Insufficiency for the Hospitalist

COMMENTARY

Opioid-Induced Adrenal Insufficiency for the Hospitalist

John M. Cunningham, MD, Anna Maria Muñoa, MD, and Kimberly A. Indovina, MD

October 27, 2021

1

Case

A 60-year-old woman with metastatic breast cancer using morphine extended release 30 mg twice daily and as-needed oxycodone for cancer-related pain presents with fever, dyspnea, and productive cough for 2 days. She also notes several weeks of fatigue, nausea, weight loss, and orthostatic lightheadedness. She is found to have pneumonia and is admitted for intravenous antibiotics. She remains borderline hypotensive after intravenous fluids and the hospitalist suspects opioid-induced adrenal insufficiency (OIAI).

How is OIAI diagnosed and managed?

Brief Overview of Issue

In the United States, 5.4% of the population is currently using long-term opioids.1 Patients using high doses of opioids for greater than 3 months are 40%-50% more likely to be hospitalized than those on a lower dose or no opioids.2 Hospitalists frequently encounter common opioid side effects such as constipation, nausea, and drowsiness, but may be less familiar with their effects on the endocrine system. Chronic, high-dose opioids can suppress the hypothalamic-pituitary-adrenal (HPA) axis and cause secondary, or central, adrenal insufficiency (AI).1

Dr John Cunningham

Recognition of OIAI is critical given the current opioid epidemic and life-threatening consequences of AI in systemically ill patients. While high-dose opioids may acutely suppress the HPA axis,3 OIAI is more commonly associated with long-term opioid use.4The prevalence of OIAI among patients receiving long-term opioids ranges from 8.3% to 29%. This range reflects variations in opioid dose, duration of use, and different methods of assessing the HPA axis.

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