A nurse is preparing to administer digoxin 7.5 mcg/kg/day PO daily to a school-age child who weighs 52 lb. Available is digoxin elixir 50 mcg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Calculation: Convert the child's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg. Patient's weight in kg = 52 lb / 2.2 lb/kg = 23.6363 kg. Calculate the total daily dose in micrograms (mcg) for the child. Total daily dose = Ordered dose (mcg/kg/day) × Patient's weight (kg) = 7.5 mcg/kg/day × 23.6363 kg = 177.272 mcg/day. Since the medication is ordered "daily," the dose per administration is the same as the total daily dose. Dose per administration = 177.272 mcg. Available concentration = 50 mcg/mL. Calculate the volume in milliliters (mL) to administer per dose. Volume (mL) = Dose per administration (mcg) / Available concentration (mcg/mL) = 177.272 mcg / 50 mcg/mL = 3.5454 mL. Round the answer to the nearest tenth. = 3.5 mL.