What is dexamethasone used for in children?

Dexamethasone is used in paediatric practice primarily for *croup (viral laryngotracheobronchitis), acute asthma exacerbations, cerebral oedema, meningitis*, and as an *antiemetic adjunct* in procedural sedation and chemotherapy. Each indication uses a different dose and frequency.

What is the dexamethasone dose for croup in children?

The recommended dose for croup is **0.6 mg/kg** (maximum 16 mg) as a *single oral dose*. This is the most evidence-supported corticosteroid dose for croup and typically produces significant symptom improvement within 30–60 minutes. A single dose is usually sufficient and repeat dosing is rarely needed.

How is dexamethasone different from prednisolone?

Dexamethasone is approximately **6–7 times more potent** than prednisolone on a milligram-for-milligram basis. It has *minimal mineralocorticoid activity*, *penetrates the blood-brain barrier* (making it preferred for cerebral oedema), and has a *longer duration of action*, allowing less frequent dosing for equivalent anti-inflammatory effect.

Why is dexamethasone replacing prednisolone for asthma in children?

Clinical trials have shown that **1–2 days of dexamethasone** (0.3 mg/kg/day) is *non-inferior* to a 3–5 day course of prednisolone for paediatric asthma exacerbations, with significantly *better adherence* and *fewer gastrointestinal side effects*. The convenience of a shorter course with once-daily dosing makes it increasingly the preferred choice in paediatric emergency settings.

Can dexamethasone be given orally to children?

**Yes.** Oral dexamethasone (solution or tablet) is effective and well-absorbed. For croup and asthma, oral administration is standard and equally effective to IM injection in cooperative children. The injection preparation can sometimes be given orally off-label — check your local formulary for approved oral formulations and concentrations.

Does dexamethasone need to be tapered in children?

**Short courses (1–3 days)** at standard doses do not require tapering. Courses longer than 2 weeks — or any course in a patient receiving frequent corticosteroid courses — require a *supervised taper* to allow HPA axis recovery. This applies to dexamethasone as it does to all systemic corticosteroids.

What is the maximum single dose of dexamethasone for croup?

The standard maximum single dose for croup is **16 mg**. For a child weighing 27 kg: 27 × 0.6 = 16.2 mg — capped at *16 mg*. For most children presenting with croup, who are typically 6 months to 6 years, the weight-based calculation will be well below this cap.

Pediatrics · Corticosteroids

Pediatric Dexamethasone
Calculator

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Paediatric Dexamethasone Calculator

Educational tool · Last reviewed: March 2026

This tool provides indication-based weight-scaled dose estimates for dexamethasone in paediatric patients.

Dexamethasone dosing varies significantly by indication, age group, route, and local protocols. The presets in this tool are for educational reference only and may not match your local formulary.

Always verify dosing, route, concentration, and monitoring requirements with the treating clinician and your institution's guidelines before giving any medication.

I understand this is educational only and will verify all dosing with local guidelines and the treating clinician.