For the pediatric patient with suspected amoxicillin-clavulanate therapy after amoxicillin failure, what is the total daily mg/kg dose recommended?

• A. 45 mg/kg/day
• B. 60 mg/kg/day
• C. 120 mg/kg/day
• D. 90 mg/kg/day

Answer: (D)

When a child hasn’t responded to amoxicillin alone, boosting the total daily dose with amoxicillin-clavulanate helps cover bacteria that produce beta-lactamase. The clavulanate part inhibits those enzymes, widening the antibiotic’s activity to common resistant pathogens, so you have enough amoxicillin exposure to be effective. The standard total daily dose is 90 mg/kg/day of amoxicillin-clavulanate, typically given as 45 mg/kg every 12 hours. This higher dosing targets organisms that may not be susceptible to amoxicillin alone, while staying within established safety margins. Lower daily doses may miss resistant bacteria, and higher doses aren’t routinely necessary and can raise adverse effects.