Ceftriaxone Dosage Calculation

A nurse is preparing to administer the antibiotic ceftriaxone to a patient with a bacterial infection. The physician has ordered ceftriaxone 1 gram IV every 24 hours. The ceftriaxone is provided in a vial labeled 500 mg per 5 mL. To accurately administer the prescribed dose, the nurse must calculate the volume of medication required. Calculate the volume in milliliters (mL) that the nurse should administer for a dose of 1 gram.
Fill in the blank: The nurse must administer mL of ceftriaxone.