Question

a nurse is preparing to administer amoxicillin 25 mg/kg/day po divided in equal doses every 8 hr to a preschooler who weighs 43 lb. available is amoxicillin suspension 250 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

$43\ \text{lb} \times \frac{1\ \text{kg}}{2.2\ \text{lb}} \approx 19.545\ \text{kg}$

Step2: Calculate daily dose

$25\ \text{mg/kg/day} \times 19.545\ \text{kg} = 488.625\ \text{mg/day}$

Step3: Find per dose amount

$\frac{488.625\ \text{mg/day}}{3\ \text{doses/day}} \approx 162.875\ \text{mg/dose}$

Step4: Compute mL per dose

$162.875\ \text{mg} \times \frac{5\ \text{mL}}{250\ \text{mg}} \approx 3.2575\ \text{mL}$

Step5: Round to nearest tenth

$3.3\ \text{mL}$

Answer:

3.3