Amoxicillin Dosing Recommendations for Pediatric Infections

High‑Dose Therapy for Suspected Resistant Streptococcus pneumoniae

For children at high risk for resistant pneumococcal disease (e.g., daycare attendance, antibiotic use within the prior 30 days, or age < 2 years), prescribe amoxicillin 80–90 mg/kg/day divided twice daily. This regimen is supported by multiple Clinical Infectious Diseases studies. [1] [2] [3] [4]
In a 24 kg child, the high‑dose range translates to 1,920–2,160 mg per day (960–1,080 mg twice daily). [1] [5]
Pharmacokinetic data show that this high‑dose schedule achieves sinus and middle‑ear fluid concentrations sufficient to overcome penicillin‑resistant S. pneumoniae. 4

Preferred oral regimen: 90 mg/kg/day in two divided doses (e.g., 1,080 mg twice daily for a 24 kg child). Evidence from Clinical Infectious Diseases supports this dosing for uncomplicated CAP. [1] [2] 3
Alternative regimen: 45 mg/kg/day in three divided doses (≈ 360 mg three times daily for a 24 kg child). Also derived from Clinical Infectious Diseases data. [1] [5]

Preferred amoxicillin dose: 50–75 mg/kg/day in two divided doses (≈ 600–900 mg twice daily for a 24 kg child). Recommended by Clinical Infectious Diseases. [1] [5]
Alternative therapy: Penicillin V 50–75 mg/kg/day administered in three to four divided doses. Supported by Clinical Infectious Diseases. 5

Standard dose for low‑risk children: 45 mg/kg/day in two divided doses (≈ 540 mg twice daily for a 24 kg child). Evidence from Pediatrics. 4
High‑dose for high‑risk children (e.g., age < 2 years, daycare attendance, recent antibiotics): 80–90 mg/kg/day in two divided doses (≈ 960–1,080 mg twice daily for a 24 kg child). Supported by Pediatrics. 4

In regions where >10 % of S. pneumoniae isolates are penicillin‑nonsusceptible, initiate high‑dose amoxicillin (80–90 mg/kg/day) to ensure adequate antimicrobial coverage. Recommendation derived from Pediatrics. 4