Stress-Dose Steroid Management for Humerus Fracture in Addison Disease
For a patient with Addison disease on 10 mg prednisone daily who sustains a humerus fracture, immediately double the oral prednisone dose to 20 mg daily and continue for 2–3 days until pain and acute stress resolve. 1
Indication for Stress-Dose Coverage
A humerus fracture constitutes moderate physiological stress requiring glucocorticoid dose escalation. Trauma, including fractures, is a recognized trigger for adrenal crisis in patients with primary adrenal insufficiency. 1, 2
Patients with Addison disease (primary adrenal insufficiency) cannot mount an endogenous cortisol response to stress, making supplementation mandatory to prevent adrenal crisis. 3, 4
The guideline principle is clear: when uncertainty exists about the need for additional glucocorticoids, they should be given, as short-term supplementation carries no long-term adverse consequences. 3
Specific Dosing Regimen
Oral Management (Preferred for Moderate Stress)
Double the patient's usual oral maintenance dose from 10 mg to 20 mg prednisone daily. 1
Continue the doubled dose for 2–3 days for uncomplicated fracture management, or longer (up to 1 week) if complications arise such as surgical intervention, infection, or persistent severe pain. 1
No taper is required after short-term stress-dose escalation; simply return to the baseline 10 mg daily once the acute stress resolves. 1
Conversion to Hydrocortisone Equivalent
If switching to hydrocortisone, the equivalent stress dose would be 100 mg daily (since 10 mg prednisone ≈ 50 mg hydrocortisone, doubled = 100 mg). 3
Hydrocortisone provides mineralocorticoid activity at physiologic doses, whereas prednisone does not; ensure the patient continues fludrocortisone 0.05–0.2 mg daily for mineralocorticoid replacement. 1, 4
When to Escalate to Parenteral Therapy
If the patient develops nausea, vomiting, inability to take oral medications, or signs of adrenal crisis (hypotension, altered mental status, severe weakness), immediately administer hydrocortisone 100 mg IM or IV. 1, 2
For surgical fixation of the fracture, give hydrocortisone 100 mg IV bolus at induction, followed by continuous infusion of 200 mg over 24 hours until oral intake resumes. 3, 1
Continuous IV infusion is superior to intermittent bolus dosing for maintaining physiologic cortisol levels during major stress. 3, 1
Critical Monitoring and Pitfalls
Monitor for early signs of adrenal crisis: malaise, somnolence, orthostatic hypotension, nausea, or persistent pain despite analgesia. 1, 5
Check serum sodium and potassium frequently, as primary adrenal insufficiency causes both glucocorticoid and mineralocorticoid deficiency, predisposing to hyponatremia and hyperkalemia. 1, 5
Never delay glucocorticoid supplementation while awaiting diagnostic confirmation; treat suspected adrenal insufficiency empirically. 1, 5
If the patient requires procedural sedation or anesthesia, avoid etomidate, as it rapidly suppresses cortisol synthesis and can precipitate adrenal crisis. 1
Patient Education Essentials
Ensure the patient has an emergency hydrocortisone injection kit (100 mg) for self-administration if unable to take oral medications. 1, 4, 2
Reinforce that any trauma, infection, or surgical procedure requires immediate dose escalation to prevent life-threatening adrenal crisis. 1, 2
Confirm the patient wears medical alert identification and carries a steroid emergency card. 1, 4
Rationale for Oral Doubling in This Case
A simple closed humerus fracture managed conservatively (without surgery) represents moderate stress, not major stress requiring IV therapy. 1
Doubling the oral dose from 10 mg to 20 mg prednisone provides adequate glucocorticoid coverage for fracture-related physiological stress, pain, and inflammation. 1
This approach is consistent with UK guidelines stating that stress-dose adjustments should reflect the magnitude and duration of the physiological stressor. 3