A child with a heart defect has been prescribed a maintenance dose of Lanoxin elixir at 0.07 mg/kg/day, divided into two doses. The child weighs 19 pounds. What is the maximum dose of medication the nurse should administer in each dose?

Step 1: Convert pounds to kilograms. 19 pounds ÷ 2.2 pounds/kg = 8.636 kg. Step 2: Calculate the total daily dose in mg. 0.07 mg/kg/day × 8.636 kg = 0.60452 mg/day. Step 3: Calculate the dose per administration (divided into two doses). 0.60452 mg/day ÷ 2 doses = 0.30226 mg/dose. Step 4: Round the dose to the hundredths place. 0.30 mg/dose.