A client receives a prescription for penicillin 1.2 million units IM. The available vial is labeled, “600,000 units/mL.” How many mL should the nurse administer? (Enter numeric value only.)

Step-by-Step Calculation Step 1: Determine the total units prescribed. The prescription is for 1.2 million units. Step 2: Determine the concentration of the available vial. The vial is labeled “600,000 units/mL.” Step 3: Calculate the volume to be administered. Volume to be administered = Total units prescribed ÷ Concentration of the vial Volume to be administered = 1,200,000 units ÷ 600,000 units/mL Result: The nurse should administer 2 mL.