A 22 kg child is treated with amoxicillin 90 mg/kg/day in two divided doses for 5 days. What is the total amount of amoxicillin required for the course in grams?

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Multiple Choice

A 22 kg child is treated with amoxicillin 90 mg/kg/day in two divided doses for 5 days. What is the total amount of amoxicillin required for the course in grams?

Explanation:
The total amount is found by converting the weight-based dose to a daily amount and then to the entire course. Multiply the child’s weight by the dose per kilogram per day: 22 kg × 90 mg/kg/day = 1980 mg per day (1.98 g/day). Over 5 days, this becomes 1.98 g/day × 5 days = 9.9 g total. Giving the dose in two divided doses doesn’t change the total amount, it just splits the daily dose into roughly 0.99 g per dose twice daily. So the course requires 9.9 grams of amoxicillin.

The total amount is found by converting the weight-based dose to a daily amount and then to the entire course. Multiply the child’s weight by the dose per kilogram per day: 22 kg × 90 mg/kg/day = 1980 mg per day (1.98 g/day). Over 5 days, this becomes 1.98 g/day × 5 days = 9.9 g total. Giving the dose in two divided doses doesn’t change the total amount, it just splits the daily dose into roughly 0.99 g per dose twice daily. So the course requires 9.9 grams of amoxicillin.

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