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The dosage of amoxicillin needed to treat an ear infection is the same as for infections of the nose and throat. 

Amoxicillin Dosage for Ear Infection… 

…In adults 

500 mg every 12 hours, or 250 mg every 8 hours.

…In children

25 mg/kg/day in divided doses every 12 hours, or 20 mg/kg/day in divided doses every 8 hours. 

…In infants 

The maximum dosage for a toddler is 30 mg/kg/day

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