The physician orders Ancef 500 mg IV for a urinary tract infection. After reconstitution, the medication is available as 330 mg/mL. How many milliliters will the nurse administer?

Step 1 is: The physician ordered 500 mg and the available concentration is 330 mg/mL. To find the volume to administer, divide the ordered dose by the available concentration: 500 mg ÷ 330 mg/mL. Step 2 is: 500 ÷ 330 = 1.5151. Step 3 is: Round to the nearest hundredth as is common for medication administration: 1.52 mL. Final answer: The nurse will administer 1.52 mL.