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# Iv hydrocortisone for acute asthma
## Overview
Intravenous (IV) hydrocortisone is a short-acting corticosteroid used as an alternative agent when oral or inhaled systemic steroids are not tolerated or when the patient is too ill to swallow. In acute asthma, systemic corticosteroids are essential to reduce airway inflammation and prevent relapse.
## Primary Indications
* Exacerbation of acute asthma requiring systemic therapy where oral administration is not feasible (e.g., persistent vomiting, intubation).
## Adult Dosing
* **Standard Dose:** 100 mg IV every 6 to 8 hours.
* **Maximum Dose:** Generally 400 mg/day; however, clinical response should guide duration and weaning.
## Pediatric Dosing
* **Standard Dose:** 5–10 mg/kg IV per dose.
* **Frequency:** Every 6 hours.
* **Maximum Dose:** 100 mg per dose.
* *Note:* Oral prednisone or prednisolone is preferred if possible.
## Dose Adjustments
* **Renal/Hepatic Impairment:** No routine dose adjustments are required for acute, short-term management.
* **Chronic Corticosteroid Use:** Patients on long-term steroid therapy may require higher physiologic doses if adrenal insufficiency is suspected.
## Contraindications
* Known hypersensitivity to hydrocortisone or any component of the formulation.
* Systemic fungal infections.
## Adverse Effects
* **Short-term:** Hyperglycemia, hypertension, hypokalemia, fluid retention, and neuropsychiatric changes (agitation, insomnia).
* **Gastrointestinal:** Increased risk of peptic ulceration, particularly with concurrent NSAID use.
## Key Drug Interactions
* **Non-steroidal Anti-inflammatory Drugs (NSAIDs):** Increased risk of GI ulceration/bleeding.
* **Diuretics:** Increased risk of hypokalemia.
* **Anticoagulants:** May alter the anticoagulant effect; monitor INR/PT closely.
* **CYP3A4 Inducers (e.g., Phenytoin, Rifampin):** May decrease hydrocortisone efficacy.
## Monitoring
* **Clinical:** Respiratory rate, breath sounds, accessory muscle use, Pulse oximetry ($SpO_2$).
* **Laboratory:** Blood glucose (especially in diabetics), serum potassium (if prolonged duration), and blood pressure.
## Clinical Pearls
* **Transitioning:** Convert to oral systemic corticosteroids (e.g., prednisolone or prednisone) as soon as the patient is able to tolerate oral intake.
* **Protocol Variance:** Dosing and frequency vary significantly by institutional protocol. Always consult your current hospital asthma pathway.
* **Onset:** Systemic corticosteroids take 4–6 hours to demonstrate a meaningful clinical effect on airway obstruction; they are not rescue medications.
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*Disclaimer: This information is for educational purposes for healthcare professionals. Local institutional protocols and current prescribing information (e.g., package inserts or clinical references like Lexicomp or UpToDate) must be verified before administration. Clinical judgment is essential.*
