While preparing a dose of ferrous sulfate, the prescription requires 80 mg, and the available solution is 64 mg/5 mL. How many mL should the nurse administer?

Identify the ordered dose and available concentration Ordered Dose: 80 mg Available Concentration: 64 mg/5 mL Calculate the volume to administer Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration Volume to administer = (80 ÷ 64) × 5 Volume to administer = 1.25 × 5 = 6.25 mL