The nurse is preparing to administer methylprednisolone 40 mg IV. The medication vial is labeled, "125 mg per 2 mL." How many mL of medication should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest hundredth.)

Here's how to calculate the volume of methylprednisolone the nurse should administer: 1. We know: Dose to administer: 40 mg (given) Concentration of the medication: 125 mg per 2 mL (given from the vial label) 2. We need to find: Volume of medication to administer (mL) Calculation: We can set up a proportion to find the volume needed for the desired dose: Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL) Rearrange the formula to solve for the volume: Volume to administer (mL) = Desired dose (mg) / Concentration (mg/mL) Plug in the values: Volume to administer (mL) = 40 mg / (125 mg/2 mL) Important note: We can divide the concentration by 2 mL because we only need the medication concentration, not the total volume in the vial (which is 2 mL). Volume to administer (mL) = 40 mg / 62.5 mg/mL (round the concentration to nearest tenth for easier calculation) Volume to administer (mL) = 0.64 mL (round to nearest hundredth) Therefore, the nurse should administer 0.64 mL of methylprednisolone.