Hydrocortisone Loading Dose in Pediatrics
For pediatric adrenal crisis, give hydrocortisone 50-100 mg/m² IV or IM as the initial loading dose, with weight-based dosing of 25 mg for children <15 kg (0-2 years), 50 mg for 15-25 kg (2-6 years), and 100 mg for >25 kg (>6 years). 1
Initial Emergency Dosing
The loading dose should be administered immediately via IV or IM route, with IM preferred if IV access cannot be established quickly. The dose can be repeated if necessary based on clinical response 1. This represents a stress dose that is 10-15 times the physiological replacement dose 2.
Weight-Based Dosing Algorithm:
- Infants and toddlers (<15 kg, 0-2 years): 25 mg hydrocortisone IV/IM
- Young children (15-25 kg, 2-6 years): 50 mg hydrocortisone IV/IM
- Older children (>25 kg, >6 years): 100 mg hydrocortisone IV/IM
Maintenance Therapy Following Loading Dose
After the initial bolus, transition to maintenance dosing at 50-100 mg/m²/24h divided every 6 hours or as a continuous IV infusion at 2-3 mg/m²/hour 1. This ensures sustained glucocorticoid coverage during the acute stress period.
Important clinical note: Fludrocortisone is not required acutely when high-dose hydrocortisone is administered, as hydrocortisone provides sufficient mineralocorticoid activity at stress doses 1.
Supportive Management
Concurrent with hydrocortisone administration:
- If shocked: Give 10-20 mL/kg 0.9% sodium chloride IV bolus, repeat as necessary
- Ongoing fluids: Maintenance plus deficit replacement using 0.9% sodium chloride with 5% glucose
- Hypoglycemia monitoring: Check blood glucose hourly; if <3.5 mmol/L, give 2-5 mL/kg of 10% glucose
- Electrolyte monitoring: Check and correct sodium and potassium abnormalities
- Hemodynamic monitoring: Blood pressure and cardiac function assessment
Transition to Oral Therapy
Once clinically stable, transition to oral hydrocortisone at 30-50 mg/m²/24h, then gradually reduce to maintenance levels. Resume mineralocorticoid replacement (fludrocortisone 0.05-0.1 mg daily) when transitioning to maintenance oral therapy 1.
Context for Non-Crisis Situations
The FDA label indicates that for general pediatric use (non-crisis), the initial dose range is 0.56 to 8 mg/kg/day in three or four divided doses (20 to 240 mg/m²/day), depending on the specific disease entity being treated 3. However, this broad range is for chronic replacement therapy, not acute adrenal crisis management.
Critical pitfall: Do not delay hydrocortisone administration while attempting to establish IV access. If peripheral access is difficult, proceed immediately with IM injection 2. The preferred method for initial emergency use is IV injection, but IM is equally acceptable when IV access is not immediately available 3.