Augmentin 200-28.5mg/5ml Dosing for 24.4kg Child
For a child weighing 24.4 kg, the appropriate dose of Augmentin 200-28.5mg/5ml suspension is 11 mL twice daily (every 12 hours) when high-dose therapy is indicated, or 5.5 mL three times daily (every 8 hours) for standard dosing.
Dosing Algorithm
The correct dose depends on the clinical indication and severity:
High-Dose Regimen (80-90 mg/kg/day of amoxicillin component)
- Indicated for: Moderate-to-severe infections, children <2 years, recent antibiotic use (within 30 days), daycare attendance, or high local resistance rates 1
- Calculation: 24.4 kg × 90 mg/kg/day = 2,196 mg/day ÷ 2 doses = 1,098 mg per dose
- Volume: 1,098 mg ÷ 200 mg/5mL = approximately 27.5 mL per dose, twice daily
CRITICAL CAVEAT: The 200-28.5mg/5ml formulation you have is NOT appropriate for high-dose therapy. This formulation contains insufficient clavulanate (28.5 mg/5mL) for the high-dose regimen, which requires 6.4 mg/kg/day of clavulanate 2.
For high-dose therapy, you must use Augmentin ES-600 (600-42.9mg/5ml), which would be 9 mL twice daily for this 24.4 kg child 2.
Standard-Dose Regimen (45 mg/kg/day of amoxicillin component)
- Indicated for: Mild-to-moderate infections in children ≥2 years without risk factors 1
- Calculation: 24.4 kg × 45 mg/kg/day = 1,098 mg/day ÷ 3 doses = 366 mg per dose
- Volume: 366 mg ÷ 200 mg/5mL = approximately 9 mL per dose, three times daily (every 8 hours)
Alternatively, for twice-daily dosing with standard dose:
- Volume: 1,098 mg/day ÷ 2 doses = 549 mg per dose = approximately 13.7 mL twice daily
Key Clinical Considerations
Risk Factors Requiring High-Dose Therapy 1:
- Age <2 years
- Daycare attendance
- Antibiotic use within past 30 days
- Moderate-to-severe illness
- Geographic areas with >10% penicillin-nonsusceptible S. pneumoniae
Formulation Limitations
The 200-28.5mg/5ml suspension is NOT interchangeable with ES-600 formulation 2. The clavulanate content differs significantly:
- 200mg/5ml contains 28.5 mg clavulanate
- ES-600 contains 42.9 mg clavulanate
- 400mg/5ml contains 57 mg clavulanate
Administration
- Give at the start of meals to minimize gastrointestinal side effects and enhance clavulanate absorption 2
- Shake suspension well before each use 2
- Refrigerate after reconstitution; stable for 10 days 2
Common Pitfalls to Avoid
Do not substitute formulations - Using 200-28.5mg/5ml for high-dose regimens provides inadequate clavulanate coverage against β-lactamase-producing organisms 2
Do not underdose - In the presence of risk factors, standard dosing may lead to treatment failure due to resistant pathogens, particularly β-lactamase-producing H. influenzae (10-42% prevalence) and penicillin-resistant S. pneumoniae 1
Verify the indication - High-dose therapy is specifically designed for respiratory tract infections where resistant pathogens are suspected 1, 3