dexamethasone dose in child
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dexamethasone dose pediatric children mg/kg indications
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I now have all the data I need from the Harriet Lane Handbook. Here is the complete, well-organized answer:
Dexamethasone Dosing in Children
(Source: The Harriet Lane Handbook, 23rd ed. - the standard pediatric drug reference)
Indication-by-Indication Doses
| Indication | Age Group | Dose | Route | Frequency / Duration |
|---|---|---|---|---|
| Croup | Infant & child | 0.6 mg/kg/dose (max 16 mg) | PO / IV / IM | Single dose |
| Asthma exacerbation | Infant, child, adolescent | 0.6 mg/kg/dose (max 16 mg) | PO / IV / IM | Q24h x 1-2 doses |
| Airway edema / extubation | Infant, child, adolescent | 0.5 mg/kg/dose (max 10 mg) | IV / IM / PO | Q6h x 6 doses; start 6-12 hr before extubation |
| Anti-inflammatory | Child | 0.08-0.3 mg/kg/24 hr | PO / IV / IM | Divided Q6-12h |
| Cerebral edema | Infant, child, adolescent (limited data) | Loading: 1-2 mg/kg x1 (max 16 mg/24h); Maintenance: 1-2 mg/kg/24 hr | IV / IM | Q4-6h maintenance |
| Chemotherapy-induced nausea | Child | Initial: 10 mg/m²/dose (max 20 mg); Subsequent: 5 mg/m²/dose | IV | Q6h for subsequent doses |
Key Points
- Croup is the most common pediatric indication - a single oral dose of 0.6 mg/kg is preferred; equally effective via IM or IV if child cannot take oral.
- For asthma, use beyond 2 days increases risk of metabolic adverse effects.
- Cerebral edema dosing carries a "limited data" caveat in pediatrics - consult neurology/PICU.
- Not recommended in infants with very low birth weight for prevention/treatment of chronic lung disease - increased risk of adverse events.
- Dexamethasone has no mineralocorticoid effect (unlike prednisone) with greater glucocorticoid potency; consider an alternative if the child has hyperglycemia.
- Drug metabolism: Substrate and moderate inducer of CYP3A4 - watch for interactions with antiepileptics (carbamazepine, phenytoin), which may require higher doses.
Formulations Available for Children
- Oral elixir: 0.5 mg/5 mL (some contain 5% alcohol - note in young children)
- Oral solution: 0.1 mg/mL or 1 mg/mL (some contain 30% alcohol)
- Injection: 4 mg/mL or 10 mg/mL (some contain benzyl alcohol - avoid in neonates)
- Tablets: 0.5, 0.75, 1, 1.5, 2, 4, 6 mg
For body surface area-based dosing and steroid equivalence comparisons, see Chapter 10 of the Harriet Lane Handbook. Always verify individual patient factors (hepatic function, concurrent medications, infection status) before use.
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