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# IV Hydrocortisone for Acute Asthma
## Overview
Intravenous hydrocortisone is a corticosteroid used as an adjunctive treatment for severe acute asthma exacerbations in patients who have not responded adequately to initial bronchodilator therapy. It works by reducing airway inflammation.
## Primary Indications
Adjunctive treatment for severe acute asthma exacerbations unresponsive to standard bronchodilator therapy.
## Adult Dosing
* **Loading Dose:** 100 mg IV every 6 to 12 hours.
* **Continuous Infusion:** May be considered in some protocols.
* **Duration:** Typically continued until the patient is clinically improving and can tolerate oral medications, then transitioned to oral corticosteroids.
## Pediatric Dosing
* **Loading Dose:** 1 to 2 mg/kg IV every 6 hours, with a maximum of 100 mg per dose.
* **Duration:** Similar to adults, transition to oral therapy when clinically appropriate.
## Dose Adjustments
No specific dose adjustments are generally required for hepatic or renal impairment, but prolonged use should be avoided.
## Contraindications
Known hypersensitivity to hydrocortisone or other corticosteroids. Systemic fungal infections.
## Adverse Effects
Common adverse effects are typically associated with short-term IV use and include hyperglycemia, fluid retention, electrolyte disturbances (hypokalemia), increased susceptibility to infection, insomnia, and mood changes.
## Key Drug Interactions
* **CYP3A4 Inducers (e.g., rifampin, phenytoin):** May increase hydrocortisone clearance, requiring higher doses.
* **CYP3A4 Inhibitors (e.g., ketoconazole, macrolides):** May decrease hydrocortisone clearance, increasing potential for toxicity.
* **Diuretics (potassium-depleting):** Increased risk of hypokalemia.
* **Vaccines:** Reduced immune response; avoid live vaccines.
## Monitoring
* Blood glucose levels, especially in diabetic patients.
* Electrolytes (potassium).
* Signs of infection.
* Clinical response to therapy (respiratory rate, oxygen saturation, work of breathing).
## Clinical Pearls
* IV hydrocortisone is most effective when given early in the course of a severe asthma exacerbation.
* It does not provide immediate bronchodilation and should not delay or replace inhaled beta-agonists.
* Transition to oral corticosteroids as soon as feasible to minimize risks associated with prolonged IV therapy.
* Ensure adequate hydration and electrolyte balance.
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*Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and local institutional protocols before administering any medication.*
