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## IV Hydrocortisone for Acute Asthma
### Overview
Hydrocortisone is a synthetic corticosteroid with anti-inflammatory properties used as an adjunct therapy in moderate to severe acute asthma exacerbations. It works by reducing airway inflammation, bronchoconstriction, and mucus production.
### Primary Indications
Adjunctive treatment for moderate to severe acute asthma exacerbations in patients who have not responded adequately to initial bronchodilator therapy.
### Adult Dosing
* **Initial Dose:** 100 mg IV every 6 to 8 hours.
* **Alternative (Stress dose):** 200 mg IV as a bolus or infused over 15-30 minutes, followed by 100 mg IV every 8 hours.
* Dosing may be continued every 4-6 hours if needed, though evidence for efficacy beyond 8-hour intervals is less robust.
* Once the patient shows improvement and can tolerate oral intake, transition to oral corticosteroids (e.g., prednisone) is recommended.
### Pediatric Dosing
* **Age 2 months to 12 years:** 1 mg/kg IV every 6 hours. Maximum dose: 60 mg per dose.
* **Age 12 years and older:** Dosing similar to adults: 100 mg IV every 6 to 8 hours.
* Dosing may be continued every 4-6 hours if needed.
* Transition to oral corticosteroids as in adults.
### Dose Adjustments
No specific dose adjustments are typically required for renal or hepatic impairment, but caution and clinical monitoring are advised, especially in severe disease.
### Contraindications
* Hypersensitivity to hydrocortisone or other components of the formulation.
* Systemic fungal infections.
* Live or live-attenuated viral vaccinations (during treatment and for at least 1 month after).
### Adverse Effects
Common adverse effects are often related to the route and duration of administration. For short-term IV use in acute asthma, the risk is generally lower but can include:
* Hyperglycemia
* Mood changes (euphoria, insomnia)
* Increased appetite
* Fluid retention
* Electrolyte imbalances (e.g., hypokalemia)
* Increased susceptibility to infection
* Adrenal suppression (with prolonged use)
### Key Drug Interactions
* **Potent CYP3A4 Inducers (e.g., rifampin, phenytoin, carbamazepine):** May decrease hydrocortisone levels.
* **Potent CYP3A4 Inhibitors (e.g., ketoconazole, itraconazole, macrolide antibiotics):** May increase hydrocortisone levels.
* **Diuretics (potassium-depleting):** Increased risk of hypokalemia.
* **Vaccines:** Live vaccines are contraindicated. Inactivated vaccines may have a diminished response.
### Monitoring
* Clinical response to therapy (respiratory rate, work of breathing, oxygen saturation, peak expiratory flow rates).
* Electrolytes (especially potassium).
* Blood glucose.
* Signs of infection.
* Adrenal function if prolonged use is anticipated.
### Clinical Pearls
* IV hydrocortisone is generally considered an adjunct therapy and should be initiated promptly in patients with moderate to severe asthma exacerbations not responding to initial bronchodilators.
* It typically takes several hours (e.g., 4-6 hours) for the full anti-inflammatory effects of IV corticosteroids to become apparent.
* Early transition to oral corticosteroids is preferred once clinical improvement is noted and the patient can tolerate oral medications.
* The evidence supporting routine use of IV corticosteroids in mild asthma exacerbations is less clear.
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*This information is intended for healthcare professionals. Always verify current prescribing information and consult with your institution's guidelines and protocols before administering any medication.*
