A nurse is preparing to administer cephalexin 50 mg/kg/day in divided doses every 8 hours to a child who weighs 33 lb. The amount available is cephalexin oral suspension 250 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) .

Step 1 is: Convert the child's weight from pounds to kilograms: 33 lb ÷ 2.2 = 15 kg. Step 2 is: Calculate the total daily dose: 50 mg/kg/day × 15 kg = 750 mg/day. Step 3 is: Calculate the dose per administration (every 8 hours, which is 3 times a day): 750 mg/day ÷ 3 = 250 mg/dose. Step 4 is: Determine the volume of medication to administer: 250 mg ÷ (250 mg/5 mL) = 5 mL. Final calculated answer: 5 mL.