A nurse is preparing to administer morphine 0.2 mg/kg IM to a client who weighs 99 lb. Available is morphine injection 10 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.)

Convert the client's weight from pounds (lb) to kilograms (kg). Client weight (kg) = 99 lb / 2.2 lb/kg = 45 kg. Calculate the total dose in milligrams (mg). Total dose (mg) = Client weight (kg) x Ordered dose (mg/kg) = 45 kg x 0.2 mg/kg = 9 mg. Calculate the volume to administer in milliliters (mL). Volume (mL) = Total dose (mg) / Available concentration (mg/mL) = 9 mg / 10 mg/mL = 0.9 mL.