A client receives a prescription for penicillin 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.)

600,000 units -> 2 mL ? -> 1 mL Cross-multiplying: (600,000 * 1) / 2 = 300,000 units 300,000 units -> 1 mL 2,000,000 units -> ? Cross-multiplying: (2,000,000 * 1 ) / 300,000 = 6.67 mL = 6.7 mL