A 28 kg child is prescribed 6 mg/kg/day; if the dose is divided into two equal doses, what is the per-dose mg?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

A 28 kg child is prescribed 6 mg/kg/day; if the dose is divided into two equal doses, what is the per-dose mg?

Explanation:
Start with the dose planning idea: convert the prescribed dose to a daily total, then divide by how many doses you give per day. Total daily dose = weight × mg/kg per day = 28 kg × 6 mg/kg/day = 168 mg/day. Since the dose is split into two equal administrations, each dose is 168 mg ÷ 2 = 84 mg. 84 mg per dose is the correct amount to give in each administration. The other numbers would result from changing the number of doses per day (for example, dividing by four would give 42 mg, which isn’t the case here).

Start with the dose planning idea: convert the prescribed dose to a daily total, then divide by how many doses you give per day.

Total daily dose = weight × mg/kg per day = 28 kg × 6 mg/kg/day = 168 mg/day.

Since the dose is split into two equal administrations, each dose is 168 mg ÷ 2 = 84 mg.

84 mg per dose is the correct amount to give in each administration. The other numbers would result from changing the number of doses per day (for example, dividing by four would give 42 mg, which isn’t the case here).

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