In patients with septic shock who appear cortisol-unresponsive (relative adrenal insufficiency), high-dose corticosteroids were found harmful in trials. Current evidence supports which specific steroid approach?

• A High-dose dexamethasone (10 mg IV every 6 hours) because it has no mineralocorticoid activity and reduces endotoxin-induced inflammation
• B Fludrocortisone alone provides the mineralocorticoid replacement needed without glucocorticoid side effects
• C ACTH stimulation testing must precede corticosteroid therapy; treat only if delta cortisol <9 mcg/dL
• D Low-dose hydrocortisone (200 mg/day IV) in norepinephrine-refractory septic shock accelerates shock reversal without worsening outcomes; high-dose methylprednisolone increases infection risk and mortality ✓

Explanation

The CORTICUS and APROCCHSS trials established that high-dose corticosteroids do not benefit septic shock and increase superinfection, while low-dose hydrocortisone (200 mg/day as continuous infusion or intermittent doses) shortens the duration of vasopressor dependency in norepinephrine/epinephrine-refractory septic shock. The 2021 Surviving Sepsis Campaign recommends hydrocortisone 200 mg/day when vasopressors cannot be weaned. ACTH stimulation testing (cosyntropin test) is no longer recommended to guide steroid use in septic shock because the delta cortisol response does not reliably identify who benefits. Fludrocortisone addition (50 mcg/day) is used in some protocols but evidence is mixed.

Reference: KD Tripathi, Essentials of Medical Pharmacology, 8th ed.

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