female in her 60s , background of mesothelioma lungs on immunotherapy , with immunotherapy induced addissons disease on daily hydrocortisone 20mg supplement, now presenting with acute diarrhea and vomiting with AKI 3 on bloods , what would be the recommended bolus dose of steroids
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adrenal crisis immunotherapy induced Addison's disease hydrocortisone bolus dose acute illness
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immune checkpoint inhibitor adrenal insufficiency adrenal crisis management
The evidence is comprehensive and consistent. Here is the full clinical answer:
Adrenal Crisis Management — Immunotherapy-Induced Addison's + AKI 3 + Vomiting/Diarrhoea
Clinical Context
This patient has primary adrenal insufficiency (immunotherapy-induced, i.e., immune checkpoint inhibitor-related adrenalitis) and is unable to absorb her oral hydrocortisone due to vomiting and diarrhoea. The combination of GI losses + missed steroid absorption + physiologic stress has precipitated an adrenal crisis, compounded by AKI stage 3 (likely pre-renal from dehydration and cortisol deficiency impairing vascular tone).
This is a medical emergency requiring immediate parenteral steroids.
Recommended Hydrocortisone Dose
| Step | Dose | Route |
|---|---|---|
| Immediate bolus | Hydrocortisone 100 mg IV | IV stat |
| Ongoing infusion | 200 mg/24 hrs as continuous IV infusion or 50 mg IV every 6 hours | Continue until tolerating oral |
| Taper | 50% reduction per day once clinically stable | Oral when tolerated |
"The first-line treatment is hydrocortisone, 100 mg IV bolus, followed by additional dosing of 200 mg/24 hrs as bolus divided every 6 hrs or infusion if critically ill or major stress." — Rosen's Emergency Medicine
"During maximally stressful situations (e.g., adrenal crisis, major surgery, trauma), an initial IV hydrocortisone bolus of 50–100 mg followed by a continuous infusion of 200 mg over 24 hours is the best coverage." — Goldman-Cecil Medicine
"A typical regime: 100 mg IV bolus of hydrocortisone followed by 50 mg IV every 6 hours and 2–3 litres of 0.9% saline." — Bailey & Love's Surgery
Additional Immediate Management
Fluids:
- 0.9% NaCl 1–2 L IV stat, then reassess (targets AKI reversal and haemodynamic support)
- Switch to 5% dextrose in normal saline if hypoglycaemia develops
Monitoring:
- Glucose (cortisol deficiency → hypoglycaemia risk)
- U&E, creatinine — AKI 3 will likely improve with steroid replacement + fluids
- BP and urine output
Mineralocorticoid: At doses ≥50 mg/day, hydrocortisone has sufficient intrinsic mineralocorticoid activity — fludrocortisone can be held during acute crisis while on IV hydrocortisone; restart when transitioning back to oral maintenance.
Do not delay steroids to await cortisol levels — if diagnosis is uncertain and you need a cortisol, give dexamethasone 4 mg IV (does not cross-react with cortisol assays), then switch to hydrocortisone.
Why 100 mg (Not Just "Double the Daily Dose")
This patient's usual maintenance is 20 mg/day oral. "Sick day rules" (doubling the oral dose) apply only to minor illness where absorption is intact. Here she has:
- Active vomiting → no oral absorption
- AKI 3 → severe physiologic stress
- Haemodynamic compromise (presumed)
This mandates the full pharmacologic stress dose of 100 mg IV bolus + 200 mg/24hr infusion, not simply a doubled oral dose.
Setting
This patient requires hospital admission (HDU/ICU level) given AKI 3 + adrenal crisis + active malignancy. Treat the precipitating illness (gastroenteritis/dehydration) concurrently.
Sources: Rosen's Emergency Medicine (Box 117.11); Goldman-Cecil Medicine (Dosing for Stress); Bailey & Love's Surgery; Tintinalli's Emergency Medicine; Braunwald's Heart Disease. Supported by recent literature (PMID 38411891 — Martel-Duguech et al., 2024, Rev Endocr Metab Disord).
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