A nurse is preparing to administer haloperidol 5 mg IM to a client. The amount available is haloperidol 20 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

The correct answer is 0.25 mL. To calculate this, divide the dose needed (5 mg) by the concentration of the medication (20 mg/mL). 5 mg ├À 20 mg/mL = 0.25 mL. This is the correct amount to administer.
Choice A (0.5 mL) is incorrect as it would be double the required dose. Choices B-G are incorrect as they do not align with the calculated amount based on the dose and concentration provided.