A nurse is preparing to administer calcitonin 4 units/kg subcutaneous to a client who weighs 165 lb. Available is calcitonin 200 units/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.)

Convert the client's weight from pounds (lb) to kilograms (kg). Weight in kg = 165 lb / 2.2 lb/kg = 75 kg. Calculate the total desired dose in units. Desired dose (units) = Desired dose (units/kg) × Weight (kg) = 4 units/kg × 75 kg = 300 units. Available concentration of the calcitonin = 200 units/mL. Calculate the volume in milliliters (mL) to administer. Volume (mL) = Desired dose (units) / Available concentration (units/mL) = 300 units / 200 units/mL = 1.5 mL.