A nurse is preparing to administer phenytoin 75 mg PO every 6 hr. Available is phenytoin 25 mg/5mL. 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.)

Calculation: Identify the ordered dose and available concentration Ordered Dose: 75 mg Available Concentration: 25 mg/5 mL Calculate the volume to administer Volume (mL) = (Ordered Dose ÷ Concentration) × Volume Volume = (75 ÷ 25) × 5 Volume = 3 × 5 = 15 mL