Difficulty: Medium
Average Score: 71%
Simulated
A nurse is caring for a child who has recurrent otitis media. The child weighs 14.9 kg (33 lb). A prescription is written for amoxicillin 40 mg/kg PO to be given in two divided doses per day. The pharmacy provides the nurse with amoxicillin 250 mg/5 mL. How many mL of the medication should the nurse plan to administer for each dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct answer
6
Rationale
Correct Answer: 6 mL
Rationale:
1. Calculate the total daily dose of amoxicillin: 40 mg/kg * 14.9 kg = 596 mg/day
2. Since the dose is divided into two doses, each dose will be half of the total daily dose: 596 mg/2 = 298 mg
3. Determine how many mL of the 250 mg/5 mL amoxicillin solution contains 298 mg: (298 mg / 250 mg) * 5 mL = 5.96 mL
4. Round the answer to the nearest whole number, which is 6 mL.
Summary:
- Choice A: Incorrect. It lacks a calculated rationale and is not the correct answer.
- Choices B-G: Irrelevant as they are not supported by the calculations.
Rationale:
1. Calculate the total daily dose of amoxicillin: 40 mg/kg * 14.9 kg = 596 mg/day
2. Since the dose is divided into two doses, each dose will be half of the total daily dose: 596 mg/2 = 298 mg
3. Determine how many mL of the 250 mg/5 mL amoxicillin solution contains 298 mg: (298 mg / 250 mg) * 5 mL = 5.96 mL
4. Round the answer to the nearest whole number, which is 6 mL.
Summary:
- Choice A: Incorrect. It lacks a calculated rationale and is not the correct answer.
- Choices B-G: Irrelevant as they are not supported by the calculations.