Maximum Pediatric Dose of Augmentin for Dog Bite Prophylaxis
For pediatric dog bite prophylaxis, the maximum dose of amoxicillin-clavulanate is 90 mg/kg/day of the amoxicillin component, divided into two doses (every 12 hours), not to exceed adult dosing. 1
Dosing Framework
Standard Prophylactic Dosing
The 2014 IDSA guidelines recommend amoxicillin-clavulanate as the first-line agent for animal bite prophylaxis 2. While the guidelines list adult dosing (875/125 mg twice daily), they do not specify exact pediatric prophylactic doses. However, the FDA-approved dosing provides clear parameters:
- Standard formulations: 20-40 mg/kg/day of amoxicillin component in divided doses 3
- High-dose formulation (ES-600): 90 mg/kg/day of amoxicillin component divided every 12 hours 1
- Absolute maximum: Do not exceed adult doses regardless of weight 3
Practical Application by Clinical Scenario
For high-risk bites requiring prophylaxis (hand/face injuries, deep punctures, immunocompromised patients, wounds >9 hours old):
- Children ≥3 months: Use 45 mg/kg/dose twice daily (90 mg/kg/day total) of the amoxicillin component 1
- Children ≥40 kg: Use adult dosing of 875/125 mg twice daily 1
- Duration: 3-5 days 2, 4
For standard-risk bites (if prophylaxis chosen):
Critical Dosing Considerations
Maximum Daily Limits
The ES-600 formulation explicitly states its maximum is 90 mg/kg/day of amoxicillin 1. This represents the upper boundary for pediatric dosing. Children weighing ≥40 kg should receive adult dosing rather than weight-based calculations that would exceed adult doses 1.
Formulation-Specific Warnings
Do not substitute formulations interchangeably - the ES-600 suspension contains 42.9 mg clavulanate per 5 mL, while standard 400 mg/5 mL contains 57 mg clavulanate per 5 mL 1. Using the wrong formulation can lead to under- or overdosing of the clavulanate component.
Evidence-Based Context
Recent pediatric studies show overall infection rates after dog bites are low (3-5.8%) regardless of antibiotic use 6, 7. The IDSA guidelines specifically recommend prophylaxis only for high-risk scenarios: immunocompromised patients, asplenic patients, advanced liver disease, significant edema, moderate-to-severe injuries (especially hand/face), or wounds penetrating periosteum/joint capsule 2, 4.
Key clinical pearl: Wounds presenting >9 hours after injury show significant benefit from prophylaxis (infection rate reduction, p=0.023), while wounds <9 hours show minimal benefit unless high-risk features present 8.
Administration Details
- Timing: Give at start of meals to minimize GI intolerance and enhance clavulanate absorption 1
- Storage: Reconstituted suspension stable 10 days refrigerated 1
- Hepatic monitoring: Required in hepatically impaired patients 1
The maximum safe dose is clearly established at 90 mg/kg/day of the amoxicillin component, but clinical judgment should guide whether prophylaxis is indicated at all, given the low baseline infection rates in most pediatric dog bites.