A nurse is reviewing a new prescription for propranolol 20 mg PO four times daily for a client who has premenstrual migraine headaches. Available is propranolol solution 4 mg/mL. The nurse should recognize that the client should take how many mL per dose? (Round the answer to the nearest whole number. Use a leading zero If it applies. Do not use a trailing zero.)
The Correct Answer is ["5"]
Given:
Prescribed dose: 20 mg of propranolol per dose
Available concentration: 4 mg/mL
Steps to solve:
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
4 mg/mL = 20 mg/X mL
Cross-multiplying gives us:
4 mg x X mL = 20 mg x 1 mL
Simplifying:
4X = 20
Solving for X:
X = 20 / 4 = 5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
Given:
Prescribed dose: 10 mg of metoclopramide
Available concentration: 5 mg/mL
Steps to solve:
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
5 mg/mL = 10 mg/X mL
Cross-multiplying gives us:
5 mg x X mL = 10 mg x 1 mL
Simplifying:
5X = 10
Solving for X:
X = 10 / 5 = 2 mL
Correct Answer is ["0.5"]
Explanation
Given:
Prescribed dose: 1 mg of phytonadione
Available concentration: 1 mg/0.5 mL
Steps to solve:
Concentration: 1 mg/0.5 mL
To administer 1 mg of phytonadione, the nurse needs to administer exactly 0.5 mL.
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