A nurse is preparing to administer diphenhydramine 40mg IM to a client who has allergies. Available is diphenhydramine injection 50mg/mL. How many mL should the nurse administer? Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero
The Correct Answer is ["0.8"]
Given:
Prescribed dose: 40 mg of diphenhydramine
Available concentration: 50 mg/mL
Steps to solve:
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
50 mg/mL = 40 mg/X mL
Cross-multiplying gives us:
50 mg x X mL = 40 mg x 1 mL
Simplifying:
50X = 40
Solving for X:
X = 40 / 50 = 0.8 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["6.7"]
Explanation
Given:
Prescribed dose: 120 mg of ferrous sulfate
Available concentration: 90 mg/5 mL
Steps to solve:
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
90 mg/5 mL = 120 mg/X mL
Cross-multiplying gives us:
90 mg x X mL = 120 mg x 5 mL
Simplifying:
90X = 600
Solving for X:
X = 600 / 90 = 6.67 mL
Round to the nearest tenth: 6.7 mL
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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