A vial of powdered medication requires reconstitution with 10 mL of sterile water to create a final concentration of 250 mg/mL. The prescribed dose is 500 mg. How many milliliters will you administer?

Step 1: Identify the formula Volume (mL) = Ordered dose (mg) ÷ Concentration (mg/mL) Step 2: Identify values Ordered dose = 500 mg Concentration = 250 mg/mL Step 3: Calculate Volume = 500 ÷ 250 = 2 mL