The invention is directed to a pediatric oral suspension composition containing amoxicillin and clavulanate potassium where the clavulanate potassium is present in an amount equal to or less than about 21.5 mg/5 mL, and a method of treating bacterial infections by providing between about one to about fourteen dosage days of the composition. Also disclosed are methods of treating a patient comprising administering amoxicillin and clavulanate potassium to the patient in dosages of at least about 80 mg/kg/day of the amoxicillin and from about 1.66 mg/kg/day to about 2.84 mg/kg/day of the clavulanate potassium. The methods are useful for treating pediatric otitis media, treating a drug resistant bacterial infection, or treating beta-lactamase producing Haemophilus influenzae or Moraxella catarrhalis in a patient under 24 months of age.
