Difficulty: Medium
Average Score: 94%
Simulated
Passage / Scenario
A child with urticaria weighing 44 lbs (20 kg)The health care provider has prescribed diphenhydramine (Benadryl) 5 mg/kg/dose for a child with urticaria weighing 44 lbs. (20 kg). Assume this is a safe dose. The medication is supplied as 12.5 mg/5 ml. How many milliliters will the nurse administer to the child for one dose? Record your answer using a whole number.
Correct answer
A
Rationale
The correct answer is A: 8 mL. To calculate this, first, determine the child's dose: 5 mg/kg x 20 kg = 100 mg. Then, convert 100 mg to mL using the medication concentration: 12.5 mg/5 mL = 100 mg/x mL. Cross multiply to get x = 40 mL. Since the child's dose is 100 mg, the nurse will administer 8 mL (100 mg ├À 12.5 mg/mL = 8 mL). Choice B (10 mL) is incorrect as it does not accurately calculate the dose based on the child's weight and medication concentration. Choices C (12 mL) and D (14 mL) are also incorrect, as they do not reflect the correct calculation of the dose per the weight of the child and medication concentration.