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# IV Hydrocortisone for Acute Asthma ## Overview Hydrocortisone is a short-acting synthetic glucocorticoid with both glucocorticoid and significant mineralocorticoid activity. It is utilized in severe, acute asthma exacerbations when oral administration is not feasible (e.g., patient intolerance, severe vomiting, or impending respiratory failure). ## Primary Indications * Status asthmaticus or severe acute asthma exacerbations unresponsive to initial intensive treatment. ## Adult Dosing * **Loading Dose:** 100–250 mg IV push. * **Maintenance:** 50–100 mg IV every 6 hours. * *Note:* Dosing is highly dependent on institutional protocols; transition to oral prednisone or methylprednisolone as soon as the patient can tolerate oral medications. ## Pediatric Dosing * **Loading Dose:** 5–10 mg/kg IV (max: 100–250 mg). * **Maintenance:** 2.5–5 mg/kg IV every 6 hours (max: 250 mg/dose). * *Note:* Equivalent to approximately 1–2 mg/kg/day of methylprednisolone divided. Always confirm dosing with local pediatric protocols or weight-based guidelines. ## Dose Adjustments * **Renal/Hepatic Impairment:** No standard dosage adjustments required for short-term acute therapy. * **Severe Infection:** Use with caution; monitor for potential masking of systemic infection signs. ## Contraindications * Known hypersensitivity to hydrocortisone. * Systemic fungal infections. * Avoid live or attenuated vaccines during high-dose therapy. ## Adverse Effects * **Common:** Hyperglycemia, hypertension, hypokalemia, fluid retention/edema. * **Serious:** Secondary adrenal insufficiency (with prolonged use), psychiatric disturbances (insomnia, mood swings, psychosis), increased risk of infection, and gastrointestinal irritation/ulceration. ## Key Drug Interactions * **CYP3A4 Inducers (e.g., Phenytoin, Rifampin):** May increase hydrocortisone metabolism, potentially reducing efficacy. * **Diabetes Medications:** May necessitate increased insulin or hypoglycemic intervention due to steroid-induced hyperglycemia. * **Loop/Thiazide Diuretics:** Concurrent use increases the risk of hypokalemia. * **NSAIDs:** Increased risk of gastrointestinal ulceration/bleeding. ## Monitoring * **Clinical:** Respiratory rate, oxygen saturation, work of breathing, and clinical response. * **Laboratory:** Serum glucose (frequent monitoring, especially in diabetics), serum potassium, and blood pressure. * **Safety:** Monitor for signs of GI distress or occult bleeding. ## Clinical Pearls * **Onset/Duration:** While systemic corticosteroids are essential for inflammation control in asthma, they have a delayed onset of action (at least 4–6 hours). They do not provide immediate bronchodilation. * **Mineralocorticoid Activity:** Hydrocortisone has higher mineralocorticoid activity compared to methylprednisolone or dexamethasone; consider this if fluid retention or electrolyte imbalance is a clinical concern. * **Switching:** Oral route is preferred whenever stable; systemic bioavailability of oral prednisone is near 100%, making IV-to-oral conversion usually 1:1. *** *Disclaimer: This information is for educational purposes for healthcare professionals. Clinical practice guidelines change frequently. Always consult your institution’s current drug formulary, protocols, and the most recent product-specific prescribing information before administering any medication.*