A client is receiving a prescription for penicillin 1.2 million units IM. The available vial is labeled, "600,000 units/2 mL". How many mL should the nurse administer? (Enter numeric value only)

The client is receiving a prescription for penicillin 1.2 million units IM. The available vial is labeled "600,000 units/2 mL", so the concentration of penicillin in the solution is 300,000 units/mL (600,000 units / 2 mL). Since the healthcare provider prescribes 1.2 million units of penicillin, the nurse should administer 4 mL of medication (1.2 million units / 300,000 units/mL).