An elderly patient is prescribed 0.25 mg of digoxin. You have 0.125 mg tablets available. How many tablets should you administer?
3 tablets
2 tablets
1 tablet
4 tablets
The Correct Answer is B
Calculation:
Ordered Dose: 0.25 mg
Available Tablet Strength: 0.125 mg
- Calculate the number of tablets
Number of Tablets = Dose ÷ Tablet Strength
Number of Tablets = 0.25 ÷ 0.125
Number of Tablets = 2 tablets
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Calculation:
- Set up the ratio
100 mg : 2 mL = 300 mg : X mL
- Solve for X using cross-multiplication
100 × X = 2 × 300
100X = 600
X = 600 ÷ 100
X = 6 mL
Correct Answer is A
Explanation
A. Use a leading zero before a decimal point: A leading zero (e.g., 0.5 mg) prevents misinterpretation of the decimal as a whole number, reducing the risk of tenfold dosing errors and promoting safe medication administration.
B. Write fractions instead of decimals: Fractions are prone to misinterpretation and calculation errors, making them unsafe for documenting medication dosages.
C. Place the unit of measurement before the number: Standard practice places the numeric value first, followed by the unit (e.g., 5 mL), to ensure clarity and prevent confusion.
D. Include a trailing zero after a whole number: Trailing zeros (e.g., 5.0 mg) are unsafe because they can be misread as ten times the intended dose; they should be avoided in medication notation.
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