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# IV Hydrocortisone for Acute Asthma
## Overview
Intravenous (IV) hydrocortisone is a corticosteroid used as an adjunct in the management of moderate to severe acute asthma exacerbations, particularly in patients who do not respond adequately to initial bronchodilator therapy. It works by reducing airway inflammation.
## Primary Indications
Adjunctive treatment for moderate to severe acute asthma exacerbations in patients refractory to standard bronchodilator therapy.
## Adult Dosing
* **Initial Dose:** 100 mg IV every 6-8 hours.
* **Alternative:** Some protocols may use higher doses (e.g., 200 mg IV) initially.
* **Duration:** Typically continued until the patient can tolerate oral steroids and their asthma is improving. Transition to oral prednisone/prednisolone is preferred as soon as clinically appropriate.
## Pediatric Dosing
* **Children > 12 years:** 100 mg IV every 6-8 hours.
* **Children < 12 years:** 1-2 mg/kg/dose IV every 6-8 hours, not to exceed 100 mg/dose.
* **Neonates/Infants:** Dosing is less established and often based on institutional protocols or expert consultation.
## Dose Adjustments
* **Renal Impairment:** No specific dose adjustment is typically required.
* **Hepatic Impairment:** May require dose reduction due to decreased metabolism.
## Contraindications
* Known hypersensitivity to hydrocortisone or other corticosteroids.
* Systemic fungal infections.
* Caution in patients with active or latent tuberculosis, herpes simplex virus infection of the eye, or recent gastrointestinal anastomosis.
## Adverse Effects
Common adverse effects associated with short-term IV use include hyperglycemia, electrolyte imbalances (hypokalemia), insomnia, mood changes, and increased susceptibility to infection. Long-term use can lead to Cushingoid effects, adrenal suppression, osteoporosis, peptic ulcers, and growth suppression in children.
## Key Drug Interactions
* **Barbiturates, Phenytoin, Rifampin, Ephedrine:** May enhance the metabolism and decrease the efficacy of hydrocortisone.
* **Estrogens:** May decrease the metabolism and increase the effects of hydrocortisone.
* **Diuretics (Potassium-depleting):** Increased risk of hypokalemia.
* **Live Vaccines:** Decreased immune response.
## Monitoring
* **Clinical Response:** Assess for improvement in respiratory rate, wheezing, oxygen saturation, and need for bronchodilators.
* **Blood Glucose:** Monitor for hyperglycemia, especially in diabetic patients or those at risk.
* **Electrolytes:** Monitor potassium levels.
* **Signs of Infection:** Be vigilant for any signs of infection.
## Clinical Pearls
* IV hydrocortisone is generally considered less potent than IV methylprednisolone or dexamethasone in acute asthma.
* Onset of action can be delayed (hours). Early administration is crucial.
* Early transition to oral corticosteroids is recommended once the patient is stable and able to tolerate oral medications.
* Consider concomitant administration of inhaled short-acting beta-agonists (SABAs) and possibly ipratropium bromide.
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*Disclaimer: This information is intended for clinical pharmacists and healthcare professionals. Always consult the most current prescribing information and institutional guidelines before administering any medication. Dosing may vary based on individual patient factors and local protocols.*
