Archer Pharmacology – Dosage Calculation and Medication Administration Practice Test 2026 - Free Pharmacology Practice Questions and Study Guide

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A medication is ordered at 12 mg/kg/day for a 10 kg patient, divided into 4 equal doses. How many milligrams should be given per dose?

25 mg

30 mg

Start with converting the order to a total daily dose. Multiply the dose per kilogram per day by the patient’s weight: 12 mg/kg/day × 10 kg = 120 mg per day. Then divide that daily amount into the four equal doses: 120 mg ÷ 4 = 30 mg per dose. So, each administration should be 30 mg.

This approach—calculate total daily dose first, then split into the number of doses per day—works for any weight-based regimen.

35 mg

40 mg

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