A nurse is preparing to administer morphine 0.3 mg/kg PO to a client who weighs 99 lb. Available is morphine oral solution 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.)

Calculation: Convert the client's weight from pounds (lb) to kilograms (kg). Weight in kg = 99 lb / 2.2 lb/kg = 45 kg. Calculate the desired dose in milligrams (mg). Desired dose (mg) = 0.3 mg/kg × 45 kg = 13.5 mg. Available concentration of the medication = 4 mg/mL. Calculate the volume in milliliters (mL) to administer. Volume (mL) = Desired dose (mg) / Available concentration (mg/mL) = 13.5 mg / 4 mg/mL = 3.375 mL. Round the answer to the nearest tenth. =3.4 mL.