Canadian Pharmacist Qualifying Exam Practice · Question
A 6-month-old infant, weighing 7.5 kg, is prescribed amoxicillin oral suspension 125 mg/5 mL at a dose of 30 mg/kg/day, divided every 12 hours, for otitis media. The prescription is for 7 days. How many milliliters should the parent administer per dose?
Total daily dose = 30 mg/kg/day * 7.5 kg = 225 mg/day. Divided every 12 hours means two doses per day, so 225 mg / 2 doses = 112.5 mg per dose. To find the volu
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Question: A 6-month-old infant, weighing 7.5 kg, is prescribed amoxicillin oral suspension 125 mg/5 mL at a dose of 30 mg/kg/day, divided every 12 hours, for otitis media. The prescription is for 7 days. How many milliliters should the parent administer per dose?
Answer options:
- 2.5 mL
- 3.0 mL
- 4.5 mL ✅ 6.0 mL
Correct answer: 6.0 mL
Explanation: Total daily dose = 30 mg/kg/day * 7.5 kg = 225 mg/day. Divided every 12 hours means two doses per day, so 225 mg / 2 doses = 112.5 mg per dose. To find the volume per dose: (112.5 mg / 125 mg) * 5 mL = 4.5 mL.
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