A nurse is preparing to administer acetaminophen 10 mg/kg PO every 4 to 6 hr PRN pain to a toddler who weighs 26.4 lb. Available is acetaminophen liquid 160 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if applicable. Do not use a trailing zero.)

Calculation: Convert the child's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg. Patient's weight in kg = 26.4 lb / 2.2 lb/kg = 12 kg. Calculate the dose in milligrams (mg) for the child. Dose (mg) = Ordered dose (mg/kg) × Patient's weight (kg) = 10 mg/kg × 12 kg = 120 mg. Determine the concentration of the available medication. The available concentration is 160 mg in 5 mL. = 160 mg / 5 mL = 32 mg/mL. Calculate the volume in milliliters (mL) to administer per dose. Volume (mL) = Dose (mg) / Concentration (mg/mL) = 120 mg / 32 mg/mL = 3.75 mL. Round the answer to the nearest tenth. = 3.8 mL.