how long for amoxicillin to work for ear
For mild to moderate sinusitis or otitis media in adults, doctors prescribe 500 mg of amoxicillin every 12 hours or 250 mg three times a day, states RxList.com. Severe infections require 875 mg of amoxicillin every 12 hours or 500 mg three times a day. Children need 25 mg/kg/day in two divided doses or 20 mg/kg/day given in three equal doses over a 24-hour period for mild to moderate infection.