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# IV Hydrocortisone for Acute Asthma
## Overview
Hydrocortisone is a short-acting systemic corticosteroid used when rapid anti-inflammatory effect is required in severe acute asthma exacerbations, particularly if the patient cannot tolerate oral intake or has concerns regarding gastrointestinal absorption.
## Primary Indications
Treatment of acute, severe asthma exacerbations unresponsive to standard initial therapy (SABA/ipratropium and oral/IV systemic steroids).
## Adult Dosing
* **Standard dose:** 100 mg IV every 6–8 hours.
* **Maximum:** Dependent on clinical response; however, oral prednisone/prednisolone is generally preferred if the patient is stable enough to tolerate oral intake. Total daily doses of hydrocortisone exceeding 400 mg are rarely necessary for asthma.
## Pediatric Dosing
* **Standard dose:** 5–10 mg/kg IV administered every 6 hours.
* **Maximum:** 100 mg per dose (400 mg per 24 hours).
* *Note: Dosing protocols vary significantly by institution; always consult local pediatric clinical guidelines.*
## Dose Adjustments
* **Hepatic/Renal Impairment:** No specific adjustment required for acute, short-term administration.
* **Transition:** Transition to oral corticosteroids (e.g., prednisone) as soon as the patient is clinically stable and able to tolerate oral medication.
## Contraindications
* Hypersensitivity to hydrocortisone or any component of the formulation.
* Systemic fungal infections.
* Administration of live or live-attenuated vaccines while on high-dose immunosuppressive regimens.
## Adverse Effects
* **Common:** Hyperglycemia, hypertension, hypokalemia, fluid retention/edema.
* **Serious:** Psychosis/mood changes, secondary infection risk, gastroduodenal ulceration, delayed wound healing.
## Key Drug Interactions
* **CYP3A4 inducers:** (e.g., rifampin, phenytoin, carbamazepine) may decrease corticosteroid concentrations.
* **NSAIDs:** Increased risk of gastrointestinal bleeding/ulceration.
* **Diuretics:** Potential for additive potassium depletion.
* **Antidiabetic agents:** Corticosteroids may decrease the effectiveness of insulin and oral hypoglycemics.
## Monitoring
* Serum glucose (especially in patients with diabetes).
* Serum electrolytes (potassium, sodium).
* Blood pressure.
* Clinical resolution of asthma symptoms (e.g., work of breathing, accessory muscle use, lung sounds).
## Clinical Pearls
* **Oral vs. IV:** Oral administration of systemic corticosteroids is as effective as IV administration for most acute asthma exacerbations, provided the patient can swallow and does not have malabsorption.
* **Onset:** Clinical benefits from systemic steroids are typically delayed by 4–6 hours regardless of the route of administration; they do not provide immediate bronchodilation.
* **Tapering:** Short courses for asthma (usually 3–10 days) typically do not require a taper.
* **Electrolytes:** Hydrocortisone has significant mineralocorticoid activity compared to other synthetic steroids (e.g., methylprednisolone), which increases the risk of sodium retention and hypokalemia.
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**Disclaimer:** This information is for educational purposes for healthcare professionals. Clinical practice guidelines and local protocols vary significantly. Always verify doses, contraindications, and drug interactions against the most current institutional prescribing information or reliable clinical decision-support databases (e.g., Lexicomp, UpToDate) before administration.
