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You are preparing to administer 40 mg of a medication supplied as 10 mg/mL. Using dimensional analysis; how many should you administer?

8 mL

2mL

4mL

6mL

Answer and Explanation

The Correct Answer is C

Calculation:

Ordered Dose: 40 mg

Available Concentration: 10 mg/mL

Set up dimensional analysis

Formula: Volume to administer = (Ordered Dose × Conversion Factor)

Conversion Factor = 1 mL ÷ 10 mg

Perform the calculation

Volume to administer = 40 × (1 ÷ 10)

Volume to administer = 4 mL

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Correct Answer is C

Explanation

Calculation:

Ordered Dose: 0.4 mg

Available Concentration: 1 mg/mL

Calculate the volume to administer

Volume to administer = Ordered Dose ÷ Concentration

Volume to administer = 0.4 ÷ 1

Volume to administer = 0.4 mL

A. 2 tablespoons B. 1 teaspoon C. 1/2 tablespoon D. 1 tablespoon

Correct Answer is D

Explanation

A. 2 tablespoons: Two tablespoons equal 30 mL, which would double the prescribed dose. Giving this amount could lead to overdosing and increase the risk of adverse effects.

B. 1 teaspoon: One teaspoon is equivalent to 5 mL. This would provide only one-third of the prescribed 15 mL dose, resulting in underdosing and reduced therapeutic effect.

C. 1/2 tablespoon: Half a tablespoon equals 7.5 mL, which is only half of the ordered dose. This amount would not meet the prescribed medication requirement.

D. 1 tablespoon: One tablespoon is equal to 15 mL. This directly matches the prescribed dose and is the correct household measurement for accurate medication administration.

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You are preparing to administer 40 mg of a medication supplied as 10 mg/mL. Using dimensional analysis; how many should you administer?

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Naxlex Comprehensive Predictor Exams

A healthcare provider orders 0.4 mg of a medication to be administered subcutaneously. The medication is available at 1 mg/mL concentration. How much should the nurse administer?

Correct Answer is C

Explanation

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Correct Answer is D

Explanation

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