A nurse is preparing to administer amoxicillin 30 mg/kg/day in 2 equally divided doses 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.)

Convert the toddler's weight from pounds (lb) to kilograms (kg). Weight in kg = 33 lb / 2.2 lb/kg = 15 kg. Calculate the total daily desired dose in milligrams (mg). Total daily desired dose (mg) = Desired dose (mg/kg/day) × Weight (kg) = 30 mg/kg/day × 15 kg = 450 mg/day. Determine the number of doses per day. The total daily dose is given in 2 equally divided doses every 12 hours. Number of doses per day = 2 doses/day. Calculate the dose per administration in milligrams (mg). Dose per administration (mg) = Total daily desired dose (mg) / Number of doses per day = 450 mg / 2 doses = 225 mg. Available concentration of the medication = 200 mg/5 mL. Calculate the volume in milliliters (mL) to administer per dose. Volume (mL) = Desired dose per administration (mg) / (Available concentration (mg) / Available volume (mL)) = 225 mg / (200 mg / 5 mL) = 225 mg / 40 mg/mL = 5.625 mL. Round the answer to the nearest tenth. = 5.6 mL.