IV Hydrocortisone Dosing for Pediatric Patients
For pediatric adrenal crisis or septic shock, give an immediate IV bolus of 50-100 mg/m² hydrocortisone, followed by maintenance dosing of 50-100 mg/m²/day divided every 6 hours or as continuous infusion. 1
Initial Bolus Dosing
The Endocrine Society guidelines provide clear weight-based dosing for emergency situations 2:
- <15 kg (0-2 years): 25 mg IV
- 15-25 kg (2-6 years): 50 mg IV
- >25 kg (>6 years): 100 mg IV
Alternatively, calculate as 50 mg/m² IV bolus for all ages, which can be repeated if necessary 1.
Maintenance Dosing
After the initial bolus, continue with 50-100 mg/m²/day using one of two methods 1, 2:
- Divided dosing: 50-100 mg/m²/day divided every 6 hours IV or IM
- Continuous infusion: 2-3 mg/m²/hour (equivalent to 50-75 mg/m²/day) 2
The continuous infusion approach may provide more stable cortisol levels, though divided dosing every 6 hours is equally acceptable and more practical in many settings.
Clinical Context Matters
For Adrenal Crisis
The 2016 Endocrine Society guidelines emphasize that under-dosing glucocorticoids in adrenal crisis is potentially hazardous 1. The recommended doses are empiric but err on the side of higher dosing given the life-threatening nature of adrenal crisis. Fludrocortisone is not required acutely when high-dose hydrocortisone is given, as hydrocortisone provides sufficient mineralocorticoid activity at stress doses 2.
For Major Surgery/Trauma
Use the same dosing: 50 mg/m² IV bolus followed by 50-100 mg/m²/day divided every 6 hours 1.
For Minor to Moderate Stress
Consider doubling or tripling maintenance oral doses rather than IV therapy, or give 50 mg/m² IM if unable to tolerate oral medication 1.
Critical Supportive Care
Always accompany hydrocortisone with:
- Rapid fluid resuscitation: 20 mL/kg normal saline bolus, repeatable up to 60 mL/kg total 1, 2
- Dextrose for hypoglycemia: 0.5-1 g/kg (or 2-4 mL/kg of D25W) if blood glucose <3.5 mmol/L, as hypoglycemia is particularly relevant in children 1, 2
- Electrolyte monitoring: Check sodium and potassium frequently 2
Tapering and Transition
Once clinically stable, taper to oral maintenance dosing of 30-50 mg/m²/day, then gradually reduce to standard maintenance levels (typically 8-10 mg/m²/day for chronic replacement) 2. Start mineralocorticoid replacement (fludrocortisone 0.05-0.1 mg daily) when transitioning off stress doses 2.
Common Pitfalls
- Don't delay treatment waiting for diagnostic confirmation—give hydrocortisone immediately if adrenal crisis is suspected 1
- Don't use dexamethasone as first-line; it's the least-preferred alternative and should only be given if no other glucocorticoid is available 1
- Don't forget fluid resuscitation—hydrocortisone alone is insufficient; aggressive fluid replacement is essential 1, 2
- Monitor blood glucose hourly in young children, as hypoglycemia is a major risk 2
The 2021 Endocrine guidelines 2 represent the most recent expert consensus and align closely with the 2016 Endocrine Society recommendations 1, providing consistent, evidence-based dosing strategies across different clinical scenarios.