Solving Problems Using Dimensional

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 provider prescribes amoxicillin 500 mg PO. The medication
available is 250 mg per capsule. How many capsules should the
nurse administer?
A. 1 capsule
B. 2 capsules
C. 3 capsules
D. 4 capsules
Correct Answer: B. 2 capsules
Rationale:
Step 1: Set up dimensional analysis.
[
500;mg \times \frac{1;capsule}{250;mg}
]
Step 2: Cancel mg.
[
\frac{500}{250}=2
]
Step 3: Administer 2 capsules.
Medication Safety Note: Always verify the medication strength
before administering multiple tablets or capsules.

,Question 2 (Easy) – Oral Dosage Calculations
A patient is prescribed 650 mg acetaminophen PO. The
available tablets contain 325 mg each.
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
Correct Answer: C. 2 tablets
Rationale:
Step 1:
[
650;mg\times\frac{1;tablet}{325;mg}
]
Step 2:
[
650÷325=2
]
Step 3: Give 2 tablets.
Medication Safety Note: Double-check that scored tablets may
be split if a partial dose is ever required.

, Question 3 (Easy) – Liquid Medication
An order reads cephalexin 375 mg PO. The suspension available
is 250 mg/5 mL.
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
Correct Answer: B. 7.5 mL
Rationale:
Step 1:
[
375;mg\times\frac{5;mL}{250;mg}
]
Step 2:
[
1875÷250=7.5;mL
]
Step 3: Measure 7.5 mL.
Medication Safety Note: Use an oral syringe for accurate
measurement of fractional milliliters.