What volume of medication should a nurse administer for a dose of 75 mg of medication if a vial contains 25 mg/5 mL?

To determine the correct volume of medication to administer for a dose of 75 mg when the vial contains a concentration of 25 mg per 5 mL, you first need to calculate how many milliliters would be required to achieve the desired 75 mg.

First, identify how many milligrams are contained in each milliliter. Since 25 mg is contained within 5 mL, you can calculate the concentration per mL:

25 mg / 5 mL = 5 mg/mL.

Next, you need to find out how many milliliters are needed to obtain 75 mg. This can be calculated using the formula:

Volume (mL) = Desired Dose (mg) / Concentration (mg/mL).

Substituting the known values into the formula gives:

Volume (mL) = 75 mg / 5 mg/mL = 15 mL.

This means that to administer a dose of 75 mg, the nurse should dispense 15 mL of the medication. Thus, the correct answer is 15 mL.