Canadian Pharmacist Qualifying Exam Practice · Question
A 9-month-old infant, weighing 8 kg, presents with a fever of 39.5°C and ear pain. The physician recommends treating with ibuprofen 10 mg/kg orally every 6-8 hours as needed. The pharmacy stocks ibuprofen suspension 100 mg/5 mL. How many mL should be given per dose?
The dose needed is 10 mg/kg * 8 kg = 80 mg. The concentration is 100 mg/5 mL. Therefore, the volume to administer is (80 mg / 100 mg) * 5 mL = 4 mL.
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Question: A 9-month-old infant, weighing 8 kg, presents with a fever of 39.5°C and ear pain. The physician recommends treating with ibuprofen 10 mg/kg orally every 6-8 hours as needed. The pharmacy stocks ibuprofen suspension 100 mg/5 mL. How many mL should be given per dose?
Answer options:
- 2 mL ✅ 4 mL
- 8 mL
- 10 mL
Correct answer: 4 mL
Explanation: The dose needed is 10 mg/kg * 8 kg = 80 mg. The concentration is 100 mg/5 mL. Therefore, the volume to administer is (80 mg / 100 mg) * 5 mL = 4 mL.
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