Adrenal Insufficiency Treatment Guidelines

Introduction to Adrenal Insufficiency Treatment

The American College of Clinical Oncology recommends hydrocortisone as the preferred treatment for adrenal insufficiency, while dexamethasone should only be used in specific emergency situations when diagnosis is uncertain or when hydrocortisone is unavailable 1, 2

Hydrocortisone has both glucocorticoid and mineralocorticoid activity, allowing for physiological replacement therapy, and its short half-life enables the recreation of the natural diurnal rhythm 3, 2
Dexamethasone is a synthetic glucocorticoid with no mineralocorticoid activity, much more potent than hydrocortisone, and has a longer duration of action, making it inadequate as sole therapy for primary adrenal insufficiency 3

The Endocrine Society suggests that hydrocortisone is the drug of choice for primary adrenal insufficiency, with typical dosing of 15-25mg daily in divided doses, providing both glucocorticoid and necessary mineralocorticoid effects 1, 2, 4
Dexamethasone lacks mineralocorticoid activity required in primary adrenal insufficiency but may be used in emergencies when diagnosis is uncertain and ACTH stimulation testing is needed 3, 1, 5

For maintenance therapy, hydrocortisone is recommended at 15-25mg daily in 2-3 divided doses, while dexamethasone is not recommended for routine maintenance therapy due to its potency and lack of mineralocorticoid activity 4, 3
For stress dosing during surgery or illness, hydrocortisone should be administered at 100mg IV at induction, followed by 200mg/24h continuous infusion for major surgery, and 2-3 times maintenance dose for moderate stress 6, 7, 1, 2

Dexamethasone provides no mineralocorticoid activity, potentially leading to life-threatening hyponatremia and hypotension in primary adrenal insufficiency, and interferes with cortisol assays and ACTH stimulation tests 3, 1, 5
Patients on hydrocortisone replacement therapy need education on stress dosing and should wear a medical alert bracelet to ensure proper management during emergencies 1, 2