A nurse is preparing to administer naloxone 0.2 mg IM to a client. Available is naloxone injection 0.4 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

To calculate the volume of naloxone to administer, we can use the following formula: Volume (mL) = Desired dose (mg) / Concentration (mg/mL) In this case: Desired dose = 0.2 mg Concentration = 0.4 mg/mL Plugging these values into the formula, we get: Volume (mL) = 0.2 mg / 0.4 mg/mL = 0.5 mL Therefore, the nurse should administer 0.5 mL of naloxone.