A patient weighing 12 kg is to receive 0.3 mg/kg. What is the total dose in milligrams?

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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 patient weighing 12 kg is to receive 0.3 mg/kg. What is the total dose in milligrams?

Explanation:
The main idea is that total dose = weight in kilograms × dose per kilogram. Here, 12 kg × 0.3 mg/kg equals 3.6 mg. The units cancel appropriately, leaving milligrams. To see it numerically: 0.3 × 12 = (0.3 × 10) + (0.3 × 2) = 3.0 + 0.6 = 3.6 mg. This matches the chosen value. The other numbers would require a different per-kilogram dose (for example, 3.0 mg would be from 0.25 mg/kg, 4.0 mg from ~0.333 mg/kg, and 3.9 mg from ~0.325 mg/kg).

The main idea is that total dose = weight in kilograms × dose per kilogram. Here, 12 kg × 0.3 mg/kg equals 3.6 mg. The units cancel appropriately, leaving milligrams. To see it numerically: 0.3 × 12 = (0.3 × 10) + (0.3 × 2) = 3.0 + 0.6 = 3.6 mg. This matches the chosen value. The other numbers would require a different per-kilogram dose (for example, 3.0 mg would be from 0.25 mg/kg, 4.0 mg from ~0.333 mg/kg, and 3.9 mg from ~0.325 mg/kg).

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