The physician orders Ancef 0.5 grams IV for a urinary tract infection. After reconstituting, the medication is available as 330 milligrams per milliliter. How many milliliters will the nurse administer? Round to the tenths.

Step 1 is to convert the ordered dose from grams to milligrams to match the available concentration. 0.5 grams × (1000 milligrams ÷ 1 gram) = 500 milligrams. Step 2 is to calculate the volume to administer using the available concentration. 500 milligrams ÷ (330 milligrams ÷ 1 milliliter) = 1.51515. milliliters. Step 3 is to round the calculated volume to the tenths place as required. The nurse will administer 1.5 milliliters.