Order: Cefaclor 125 mg p.o. q8h is ordered for a child weighing 22 lb. The safe dosage range is 20 to 40 mg/kg/day divided into q8h doses. It is available as Cefaclor oral suspension 125 mg per 5 mL. Round to the nearest tenths place where applicable and enter numeric value only (no commas or labels) . How many milliliters of cefaclor are needed to administer each dose? ________ mL

Step 1 is to convert the child's weight from pounds (lb) to kilograms (kg) Weight in kg = 22 ÷ 2.2 22 ÷ 2.2 = 10 kg Step 2 is to calculate the total daily dose ordered Total daily dose = Dose per administration × number of doses 125 × 3 = 375 mg/day Step 3 is to calculate the safe daily range for this child Minimum safe mg = 10 kg × 20 mg/kg = 200 mg/day Maximum safe mg = 10 kg × 40 mg/kg = 400 mg/day The ordered 375 mg/day is between 200 and 400. Result = YES. Step 4 is to calculate the volume for one dose (125 mg) mL per dose = (Ordered dose ÷ Available dose) × Available volume (125 ÷ 125) × 5 = Result 125 ÷ 125 = 1 1 × 5 = 5 Step 5 is to round to the nearest tenth 5 = 5.0 Answer: 5.0 mL