The nurse is preparing to administer the daily maintenance dose of digoxin to an infant: Infant's Weight: 5kg Order: Administer 4mcg/kg/day Safe Dose: 3.4 to 5.1 mcg/kg/day Label: 0.25 mg/5mL

To calculate the daily maintenance dose of digoxin for the infant, we first convert the ordered amount from micrograms to milligrams: 4 mcg/kg/day is equivalent to 0.004 mg/kg/day. For an infant weighing 5 kg, the daily dose would be 0.004 mg/kg/day * 5 kg = 0.02 mg/day. Now, using the concentration provided on the label, which is 0.25 mg/5 mL, we can find out how many milliliters would equate to the required daily dose. This is done by setting up a proportion: (0.25 mg / 5 mL) = (0.02 mg / X mL). Solving for X gives us X = (0.02 mg * 5 mL) / 0.25 mg, which equals 0.4 mL.