A nurse is preparing to administer digoxin 30 mcg/kg/day PO divided in equal doses every 8 hr to a school-age child who weighs 88 lb. Available is digoxin elixir 0.05 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

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 = 88 lb / 2.2 lb/kg = 40 kg. Calculate the total daily dose in micrograms (mcg) for the child. Total daily dose (mcg) = Ordered dose (mcg/kg/day) × Patient's weight (kg) = 30 mcg/kg/day × 40 kg = 1200 mcg/day. Calculate the dose per administration (every 8 hr, which is 3 doses per day). Dose per administration (mcg) = Total daily dose (mcg/day) / 3 doses/day = 1200 mcg / 3 = 400 mcg/dose. Convert the dose per administration from micrograms (mcg) to milligrams (mg). Dose per administration (mg) = 400 mcg / 1000 mcg/mg = 0.4 mg. Available concentration = 0.05 mg/mL. Calculate the volume in milliliters (mL) to administer per dose. Volume (mL) = Dose per administration (mg) / Available concentration (mg/mL) = 0.4 mg / 0.05 mg/mL = 8 mL.