How many mL should the nurse administer if the furosemide concentration is 20 mg/mL for a dose of 40 mg?

To determine how many milliliters of furosemide to administer for a dose of 40 mg when the concentration is 20 mg/mL, you can use a straightforward calculation.

First, you need to find out the volume required for the 40 mg dose. Since the medication concentration is 20 mg/mL, you would divide the desired dose by the concentration:

40 mg ÷ 20 mg/mL = 2 mL.

This calculation shows that to achieve the required dose of 40 mg, you would need to administer 2 mL of the furosemide solution. Thus, the correct choice reflects that appropriate volume.