A child who weighs 66 pounds receives a prescription for amoxicillin 80 mg/kg/day by mouth in divided doses every 12 hours. How many mg should the nurse administer with each dose? (Enter numerical value only.)

A child who weighs 66 pounds receives a prescription for amoxicillin 80 mg/kg/day by mouth in divided doses every 12 hours. Since 1 kg is equal to 2.2 pounds, the child weighs approximately 30 kg (66 pounds ÷ 2.2 pounds/kg = 30 kg). This means that the child is receiving a total of 2400 mg of amoxicillin per day (80 mg/kg/day × 30 kg = 2400 mg/day). Since there are 24 hours in a day and the doses are given every 12 hours, the child will receive a total of 2 doses per day (24 hours/day ÷ 12 hours/dose = 2 doses/day). Therefore, for each dose, the nurse should administer 1200 mg of amoxicillin (2400 mg/day ÷ 2 doses/day = 1200 mg/dose).