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 ["3"]
Explanation
Given:
Prescribed dose: 30 mEq of potassium chloride per dose
Available tablets: 10 mEq tablets
Steps to solve:
Determine the number of tablets per dose:
Find how many 10 mEq tablets are needed to make 30 mEq of potassium chloride.
Set up a proportion to solve for the unknown number of tablets (X):
10 mEq/tablet = 30 mEq/X tablets
Cross-multiplying gives us:
10 mEq x X tablets = 30 mEq x 1 tablet
Simplifying:
10X = 30
Solving for X:
X = 30 / 10 = 3 tablets
Correct Answer is ["1.3"]
Explanation
Given:
Prescribed dose: 2.5 mg of methadone per dose
Available concentration: 10 mg/5 mL
Steps to solve:
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
10 mg/5 mL = 2.5 mg/X mL
Cross-multiplying gives us:
10 mg x X mL = 2.5 mg x 5 mL
Simplifying:
10X = 12.5
Solving for X:
X = 12.5 / 10 = 1.25 mL
Round off to the nearest tenth:
1.3 mL
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