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The standard pediatric dose for cefazolin is 20 mg/kg/day. The order is written for 150 mg tid. The infant weighs 8 lbs. This dose is:

a) 90 mg
b) 135 mg
c) 150 mg
d) 180 mg

Answer :

Final answer:

The correct dosage is 150 mg of cefazolin for the infant based on the weight and prescription provided.Therefore, the correct answer is option c) 150 mg.

Explanation:

To solve the problem, you first need to convert the infant's weight from pounds (lbs) to kilograms (kg) using the conversion factor.

To calculate the number of tablets required:

  1. Convert the weight from lbs to kg: 8 lbs = 8/2.20462 = 3.63 kg
  2. Calculate the total daily dose: 20 mg/kg/day x 3.63 kg = 72.6 mg
  3. Determine the dose per administration: 72.6 mg / 3 doses = 24.2 mg per dose
  4. Since the order is for 150 mg per dose, the dose provided is 150 mg.
  5. Therefore, the correct answer is 150 mg (c).

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