Dosage Calculations Made Easy: Solving Problems Using Dimensional Analysis 8th Edition Test Bank – Chapter-by-Chapter Exam Prep

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




TEST BANK

,Question 1 (Easy – Oral Tablet Calculation)
A provider prescribes amoxicillin 500 mg PO every 8 hours. The
available tablets are 250 mg each. How many tablets should the
nurse administer per dose?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 2.5 tablets
Correct Answer: C. 2 tablets
Rationale:
Step 1: Set up dimensional analysis.
500 mg×1 tablet250 mg500\ \text{mg} \times \frac{1\
\text{tablet}}{250\ \text{mg}}500 mg×250 mg1 tablet
Step 2: Cancel mg.
=500250=2 tablets=\frac{500}{250}=2\ \text{tablets}=250500
=2 tablets
Step 3: Administer 2 tablets.
Medication Safety Note:
Always verify tablet strength before administering multiple
tablets.

,Question 2 (Easy – Liquid Medication)
The provider orders acetaminophen 650 mg PO. The available
liquid contains 160 mg/5 mL.
How many milliliters should the nurse administer?
A. 15.3 mL
B. 18.8 mL
C. 20.3 mL
D. 22.5 mL
Correct Answer: C. 20.3 mL
Rationale:
Step 1:
650 mg×5 mL160 mg650\ \text{mg}\times\frac{5\
\text{mL}}{160\ \text{mg}}650 mg×160 mg5 mL
Step 2:
=3250160=20.3125 mL=\frac{3250}{160}=20.3125\
\text{mL}=1603250=20.3125 mL
Step 3:
Round to the nearest tenth.
= 20.3 mL

, Medication Safety Note:
Use an oral syringe for accurate measurement.


Question 3 (Easy – Metric Conversion)
Convert 2.5 grams to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C. 2,500 mg
Rationale:
Step 1:
2.5 g×1000 mg1 g2.5\ \text{g}\times\frac{1000\ \text{mg}}{1\
\text{g}}2.5 g×1 g1000 mg
Step 2:
=2500 mg=2500\ \text{mg}=2500 mg
Medication Safety Note:
Incorrect metric conversions are a common source of
medication errors.