The health care provider orders chlorpromazine 25 mg IM. The drug ...

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The health care provider orders chlorpromazine 25 mg IM. The drug is supplied as chlorpromazine 50 mg/mL in a 1-mL ampule. How much would the nurse administer?
 
  A) 0.25 mL
  B) 0.5 mL
  C) 0.75 mL
  D) 1.0 mL

Question 2

A nursing instructor is describing how to perform dosage calculations using dimensional analysis. Which of the following would the instructor emphasize to ensure accuracy?
 
  A) A formula that is specific to the drug being administered is needed.
  B) Decimals rather than fractions are used to determine amounts.
  C) Proportions are needed but labels related to units are not important.
  D) The focus is on the unit of measure set up in a specific order.

[Joc]

Answer to Question 1

Ans: B
Feedback:
The drug is supplied as 50 mg in 1 mL. Calculating the dosage using the formula D/H  Q, the equation would read: 25 mg/50 mg  1 mL = 0.5 mL.

Answer to Question 2

Ans: D
Feedback:
Dimensional analysis is a method used to perform calculations where the focus is on the units of measure, thereby eliminating the need to memorize equations. Because the units are set up in a specific order, it eliminates the need to be concerned about setting up proportions correctly. When using DA to calculate dosage problems, dosages are written as common fractions.

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Thank you!

[Joc]

Always glad to help...