Combination of amoxicillin and amoxicillin-clavulanate recommended to provide high dose of amoxicillin (for pen-I/R S. pneumoniae) and regular dose of amoxicillin-clavulanate (for coverage of ampicillin resistant H. influenzae and M. catarrhalis) without excessive clavulanate (> 10mg/kg/day) - which may lead to increased incidence of diarrhea.