A patient is prescribed 0.2 mg/kg; the patient weighs 45 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 is prescribed 0.2 mg/kg; the patient weighs 45 kg. What is the total dose in milligrams?

Explanation:
Multiply the dose per kilogram by the patient’s weight in kilograms. The order is 0.2 mg/kg and the patient weighs 45 kg, so 0.2 × 45 = 9 mg. Therefore, the total dose is 9 mg. Quick check: 9 mg ÷ 45 kg = 0.2 mg/kg, which matches the prescription. The other total doses would imply different mg/kg doses (for example, 6 mg would be 0.133 mg/kg, 8 mg would be 0.178 mg/kg, etc.), not the given 0.2 mg/kg.

Multiply the dose per kilogram by the patient’s weight in kilograms. The order is 0.2 mg/kg and the patient weighs 45 kg, so 0.2 × 45 = 9 mg. Therefore, the total dose is 9 mg. Quick check: 9 mg ÷ 45 kg = 0.2 mg/kg, which matches the prescription. The other total doses would imply different mg/kg doses (for example, 6 mg would be 0.133 mg/kg, 8 mg would be 0.178 mg/kg, etc.), not the given 0.2 mg/kg.

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