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# IV Hydrocortisone for Acute Asthma
## Overview
Hydrocortisone is a short-acting systemic corticosteroid used in acute asthma exacerbations when oral administration is not feasible (e.g., severe respiratory distress, vomiting, or intubated patients). It provides rapid anti-inflammatory effects by suppressing cytokine production and leukocyte infiltration.
## Primary Indications
* Management of acute, severe asthma exacerbations unresponsive to initial rescue therapy.
* Patients unable to tolerate oral corticosteroids.
## Adult Dosing
* **Dose:** 100 mg IV every 6 to 8 hours.
* **Maximum:** Typically 400 mg daily; dosing should be transitioned to oral prednisone/prednisolone as soon as the patient can tolerate oral medications.
## Pediatric Dosing
* **Dose:** 2–4 mg/kg/dose IV every 6 hours.
* **Maximum:** 100 mg per dose.
* *Note:* Dosing protocols vary significantly by institution; always consult local pediatric asthma guidelines or an emergency/critical care formulary.
## Dose Adjustments
* **Hepatic Impairment:** Clearance may be decreased; use the lowest effective dose.
* **Renal Impairment:** No specific adjustment required.
* **Duration:** Short-term usage is generally prioritized to minimize HPA axis suppression.
## Contraindications
* Systemic fungal infections.
* Known hypersensitivity to hydrocortisone or any component of the formulation.
## Adverse Effects
* **Common:** Hyperglycemia (common even in non-diabetics), fluid retention, hypertension, and insomnia.
* **Serious:** Hypokalemia, mood/psychiatric disturbances, increased risk of infection, and gastrointestinal ulceration.
## Key Drug Interactions
* **CYP3A4 Inhibitors/Inducers:** Hydrocortisone is a substrate; adjust monitoring if adding/removing strong inhibitors (e.g., ketoconazole) or inducers (e.g., rifampin).
* **Diuretics:** Potential for additive hypokalemia.
* **Vaccines:** Avoid live vaccines while on systemic corticosteroids due to immunosuppression.
## Monitoring
* **Clinical:** Respiratory rate, oxygen saturation, work of breathing, and lung sounds.
* **Laboratory:** Serum glucose (especially in diabetics), electrolytes (potassium), and signs of infection.
## Clinical Pearls
* **Transition to Oral:** Systemic superiority of IV vs. oral corticosteroids has not been clearly proven in asthma; prioritize oral administration (prednisolone/prednisone) as soon as clinically stable.
* **Onset:** While IV administration is faster, therapeutic benefit in status asthmaticus is delayed, typically requiring 4–6 hours to show improvement.
* **Steroid-Sparing:** Does not replace the need for aggressive bronchodilator therapy (SABA/SAMA).
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**Educational Disclaimer:** This information is for educational purposes only. Clinical practice is subject to institutional protocols and individual patient factors. Always verify the most current prescribing information, package inserts, and hospital guidelines before administering medication.
