Should I give a 100 mg intravenous hydrocortisone loading dose to a patient suspected of adrenal crisis who cannot tolerate oral medication?

Yes, absolutely give 100 mg IV hydrocortisone immediately for suspected adrenal crisis

For an adult patient with suspected adrenal crisis who cannot tolerate oral medication, you should administer 100 mg IV hydrocortisone as an immediate bolus injection, followed by continuous IV infusion of 200 mg/24 hours or 50 mg every 6 hours. This is the standard of care and can be life-saving 1, 2.

Immediate Management Algorithm

Initial Bolus Dose

• Adults: 100 mg hydrocortisone IV push over 30 seconds to 10 minutes 1, 3
• Children >6 years or >25 kg: 100 mg IV 2
• Children 2-6 years (15-25 kg): 50 mg IV 2
• Infants <2 years (<15 kg): 25 mg IV 2

The 100 mg dose can be repeated at 2,4, or 6-hour intervals if the patient's response is inadequate 3.

Maintenance Therapy (After Initial Bolus)

Following the initial injection, continue with:

• 200 mg hydrocortisone per 24 hours via continuous IV infusion, OR
• 50 mg hydrocortisone IV/IM every 6 hours 1, 2

Continue this regimen while the patient is nil by mouth or has postoperative nausea and vomiting 2.

Critical Concurrent Interventions

Beyond the hydrocortisone bolus, you must simultaneously:

1. Aggressive fluid resuscitation: 1000 mL isotonic saline rapidly within the first hour 1

   • If shocked: 10-20 mL/kg bolus, repeat as needed 2
   • Continue with 0.9% saline + 5% glucose guided by clinical response

2. Monitor and correct hypoglycemia: Check glucose hourly

   • If <3.5 mmol/L in children: give 2-5 mL/kg of 10% glucose 2
   • Adults: standard hypoglycemia protocols

3. Electrolyte monitoring: Check sodium and potassium, treat abnormalities 2

4. Cardiac monitoring and blood pressure support 2

Important Clinical Pearls

Fludrocortisone is NOT required acutely when high-dose hydrocortisone is given, as 100+ mg hydrocortisone provides sufficient mineralocorticoid activity 2. Only add fludrocortisone (0.05-0.1 mg daily) when transitioning to maintenance oral therapy 2.

Do not delay treatment to confirm the diagnosis. If adrenal crisis is suspected based on clinical presentation (hypotension, volume depletion, altered mental status, hyponatremia, hyperkalemia), treat immediately 1, 4. The mortality risk of untreated adrenal crisis far outweighs any risk from empiric steroid administration.

Alternative glucocorticoids if hydrocortisone unavailable 1:

• Prednisolone (preferred alternative)
• Dexamethasone (least preferred, only if nothing else available)

Tapering Strategy

After 48-72 hours of high-dose therapy and clinical stabilization 3:

• Reduce to hydrocortisone 100 mg/24 hours
• Transition to oral therapy when tolerated (typically 30-50 mg/m²/24h initially) 2
• Gradually taper to maintenance doses over several days
• Resume fludrocortisone when on oral maintenance therapy

The key pitfall is under-dosing or delaying treatment. There are no systematic dose-response studies, so recommendations are empiric, but erring on the side of higher doses in acute crisis is appropriate 1. The 100 mg IV bolus followed by 200 mg/24h represents the consensus standard across multiple international guidelines 2, 1.