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 ["0.65"]
Explanation
Given:
Prescribed dose: 104 mg of medroxyprogesterone
Available concentration: 104 mg/0.65 mL
Steps to solve:
Concentration is 104 mg/0.65 mL
To administer 104 mg of medroxyprogesterone, the nurse needs to administer exactly 0.65 mL.
Correct Answer is ["0.25"]
Explanation
Given:
Prescribed dose: 250 mcg of terbutaline
Available concentration: 1 mg/mL
Steps to solve:
Convert mg to mcg:
1 mg = 1000 mcg
1 mg/mL = 1000 mcg/mL
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
1000 mcg/mL = 250 mcg/X mL
Cross-multiplying gives us:
1000 mcg x X mL = 250 mcg x 1 mL
Simplifying:
1000X = 250
Solving for X:
X = 250 / 1000 = 0.25 mL
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