What is the recommended lifelong management for primary adrenal insufficiency, including glucocorticoid and mineralocorticoid replacement, stress dosing, and monitoring?

Primary Adrenal Insufficiency: Lifelong Management

All patients with primary adrenal insufficiency require lifelong glucocorticoid replacement with hydrocortisone 15-25 mg daily in divided doses (highest dose in morning), plus mineralocorticoid replacement with fludrocortisone 50-100 mcg daily, with mandatory patient education on stress dosing and emergency glucocorticoid administration to prevent adrenal crisis and death. 1

Glucocorticoid Replacement

Standard Dosing

• First-line: Hydrocortisone 15-25 mg/day divided into 2-3 doses
  • Highest dose upon awakening
  • Second dose early afternoon (2 hours after lunch) for 2-dose regimen
  • Or lunch and afternoon for 3-dose regimen 1
• Alternative: Prednisolone 3-5 mg/day once or twice daily (especially for compliance issues) 1
• Avoid: Dexamethasone due to Cushingoid side effects from difficult dose titration 1

Pediatric Dosing

• Hydrocortisone 8 mg/m² body surface area divided into 3-4 doses
• Avoid long-acting synthetic glucocorticoids (prednisolone, dexamethasone) 1

Mineralocorticoid Replacement

Fludrocortisone is mandatory for all patients with confirmed aldosterone deficiency 1

• Starting dose: 50-100 mcg in adults
• Do not restrict salt intake
• If blood pressure remains uncontrolled despite optimization, add antihypertensive therapy while continuing fludrocortisone 1

The evidence strongly emphasizes that mineralocorticoid replacement is often inadequate in clinical practice, with many patients experiencing persistent salt craving and postural symptoms despite treatment 2. This underscores the importance of aggressive titration based on clinical response.

Monitoring Strategy

Glucocorticoid Monitoring

Monitor clinically, NOT hormonally 1

• Body weight
• Postural blood pressure
• Energy levels
• Signs of glucocorticoid excess (Cushingoid features)

The guidelines explicitly recommend against hormonal monitoring of glucocorticoid replacement, adjusting treatment only based on clinical response 1.

Mineralocorticoid Monitoring

• Clinical assessment: salt craving, postural hypotension, edema
• Blood electrolytes (sodium, potassium)
• Blood pressure 1

Stress Dosing Protocol

Minor Stress (fever, infection with antibiotics, emotional stress, minor surgery with local anesthesia)

• Double the daily glucocorticoid dose until stress resolves
• Example: Hydrocortisone 40 mg daily (20 mg morning, 10 mg midday, 10 mg 5PM) 3

Moderate to Major Stress (severe illness requiring hospitalization, major trauma, surgery with general/regional anesthesia, labor/delivery)

Parenteral glucocorticoids are required 3

• Hydrocortisone 100 mg IV immediately
• Continue parenteral administration until stress resolves
• For surgery: hydrocortisone stress dosing similar to major surgical stress 1

Prolonged Vomiting/Diarrhea

• Consider parenteral glucocorticoids even without hemodynamic instability
• Oral absorption may be compromised 3

Adrenal Crisis Recognition

This is a life-threatening emergency requiring immediate treatment before diagnostic confirmation 1

• Suspect in patients with: hypotension, volume depletion, hyponatremia, hyperkalemia, fever, abdominal pain, altered mental status
• Immediate IV hydrocortisone at stress dose
• Aggressive fluid resuscitation
• Mortality rate: 0.5 per 100 patient-years if untreated 4

Special Populations

Pregnancy

• Monitor at least once per trimester for signs of over/under-replacement (weight gain, fatigue, postural hypotension, hypertension, hyperglycemia) 1
• Increase hydrocortisone dose during third trimester based on clinical course 1
• Use hydrocortisone over cortisone acetate, prednisolone, or prednisone
• Never use dexamethasone (not inactivated in placenta) 1
• Hydrocortisone stress dosing during active labor 1

DHEA Replacement in Women

Consider 6-month trial in women with persistent low libido, depressive symptoms, or low energy despite optimized glucocorticoid/mineralocorticoid replacement 1

• Monitor morning DHEAS levels (aim for mid-normal range)
• Discontinue if no sustained benefit after 6 months 1

Patient Education Requirements

Every patient must receive:

1. Steroid emergency card
2. Injectable glucocorticoid preparation (hydrocortisone 100 mg IM) for emergency self-administration 1, 5
3. Instructions on stress dose adjustments
4. Recognition of adrenal crisis symptoms
5. Instructions to seek immediate medical attention for severe illness

Follow-up Schedule

• Annual visits with endocrinologist or healthcare provider with endocrine expertise 1
• Monitor for associated autoimmune diseases, particularly autoimmune thyroid disease 1

Critical Pitfalls to Avoid

1. Under-replacement of mineralocorticoids: Many patients remain symptomatic with standard dosing; titrate aggressively based on salt craving and postural symptoms 2
2. Failure to provide stress dosing education: Leading cause of preventable adrenal crisis and death 4
3. Using dexamethasone for maintenance therapy: Difficult to titrate and causes Cushingoid effects 1
4. Relying on hormonal monitoring instead of clinical assessment for glucocorticoid dose adjustment 1
5. Delaying treatment in suspected adrenal crisis: Treatment takes precedence over diagnostic confirmation 1