Question

a nurse is preparing to administer cefaclor 40 mg/kg/day po divided in equal doses every 8 hr to a child who weighs 48 lb. available is cefaclor suspension 375 mg/5 ml. how many ml should the nurse administer per dose? (round the answer to the nearest tenth. use a leading zero if it applies. do not use a trailing zero.)

Explanation:

Step1: Convert weight to kg

$48\ \text{lb} \times \frac{1\ \text{kg}}{2.2\ \text{lb}} \approx 21.818\ \text{kg}$

Step2: Calculate daily dose

$40\ \text{mg/kg/day} \times 21.818\ \text{kg} = 872.72\ \text{mg/day}$

Step3: Find dose per administration

$\frac{872.72\ \text{mg/day}}{3\ \text{doses/day}} \approx 290.907\ \text{mg/dose}$

Step4: Calculate mL per dose

$290.907\ \text{mg} \times \frac{5\ \text{mL}}{375\ \text{mg}} \approx 3.879\ \text{mL}$

Step5: Round to nearest tenth

$3.9\ \text{mL}$

Answer:

3.9