Dosage Calculations Made Easy 8th Edition Test Bank Exam Prep

DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG




TEST BANK

,Question 1 (Easy) – Dimensional Analysis Fundamentals
A nurse receives an order for acetaminophen 650 mg PO. The
medication available is acetaminophen 325 mg tablets. How
many tablets should the nurse administer?
• A. 1 tablet
• B. 1.5 tablets
• C. 2 tablets
• D. 2.5 tablets
Correct Answer: C. 2 tablets
Rationale:
• Step 1: Identify the ordered dose and available dose.
o Ordered = 650 mg
o Available = 325 mg/tablet
• Step 2: Set up dimensional analysis.
650 mg × (1 tablet / 325 mg) = 2 tablets
• Step 3: Calculate.
650 ÷ 325 = 2
The nurse should administer 2 tablets.
Medication Safety Note:

,Always verify that the ordered dose matches the medication
administration record before calculating the number of tablets.


Question 2 (Easy) – Metric Conversion
A medication order requires 0.5 g of a medication. How many
milligrams is this?
• A. 5 mg
• B. 50 mg
• C. 500 mg
• D. 5,000 mg
Correct Answer: C. 500 mg
Rationale:
• Step 1: Recall the conversion.
1 g = 1,000 mg
• Step 2: Set up dimensional analysis.
0.5 g × (1,000 mg / 1 g) = 500 mg
• Step 3: Calculate.
0.5 × 1,000 = 500 mg
Medication Safety Note:

, Pay close attention to decimal points when converting between
grams and milligrams to prevent ten-fold dosing errors.


Question 3 (Easy) – Oral Liquid Medication
An order reads amoxicillin 250 mg PO. The suspension available
is 125 mg/5 mL. How many milliliters should the nurse
administer?
• A. 5 mL
• B. 7.5 mL
• C. 10 mL
• D. 15 mL
Correct Answer: C. 10 mL
Rationale:
• Step 1: Determine the available concentration.
125 mg = 5 mL
• Step 2: Set up dimensional analysis.
250 mg × (5 mL /125 mg) = 10 mL
• Step 3: Calculate.
(250 × 5) ÷ 125 = 10 mL
Medication Safety Note: