A nurse is preparing to administer amoxicillin 30 mg/kg/day divided equally every 12 hr to a toddler who weighs 33 lb. Available is amoxicillin 200 mg/5 mL suspension. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Calculation: Convert the patient's weight from pounds (lb) to kilograms (kg). Patient weight (kg) = 33 lb / 2.2 lb/kg = 15 kg. Calculate the total dose per day. Total dose (mg/day) = Patient weight (kg) x Ordered dose (mg/kg/day) = 15 kg x 30 mg/kg/day = 450 mg/day. Calculate the dose to be administered every 12 hours. Dose per administration (mg) = Total dose (mg/day) / 2 = 450 mg / 2 = 225 mg. Calculate the volume to administer in milliliters (mL). Available concentration = 200 mg / 5 mL = 40 mg/mL. Volume to administer (mL) = Dose per administration (mg) / Available concentration (mg/mL) = 225 mg / 40 mg/mL = 5.625 mL. Round to the nearest tenth. = 5.6 mL.