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 acetaminophen 650 mg PO. The available
tablets contain 325 mg per tablet. How many tablets should the
nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
Correct Answer: C. 2 tablets
Rationale:
Step 1: Set up dimensional analysis
[
650\ mg \times \frac{1\ tablet}{325\ mg}
]
Step 2: Cancel units
mg cancels, leaving tablets.
Step 3: Calculate
,[
650 \div 325 = 2
]
Administer 2 tablets.
Medication Safety Note:
Always verify the tablet strength before administration to
prevent underdosing or overdosing.
Question 2 (Easy) – Liquid Medication Calculation
A child is prescribed 240 mg of an oral antibiotic. The
suspension is labeled 120 mg/5 mL. How many milliliters should
the nurse administer?
A. 5 mL
B. 8 mL
C. 10 mL
D. 12 mL
Correct Answer: C. 10 mL
Rationale:
Step 1:
, [
240\ mg \times \frac{5\ mL}{120\ mg}
]
Step 2:
Cancel mg.
Step 3:
[
240 \times 5 =1200
]
[
1200 \div120=10
]
Administer 10 mL.
Medication Safety Note:
Use an oral dosing syringe for accurate measurement.
Question 3 (Easy) – Metric Conversion
Convert 2.5 g to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy) – Dimensional Analysis Fundamentals
A provider prescribes acetaminophen 650 mg PO. The available
tablets contain 325 mg per tablet. How many tablets should the
nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
Correct Answer: C. 2 tablets
Rationale:
Step 1: Set up dimensional analysis
[
650\ mg \times \frac{1\ tablet}{325\ mg}
]
Step 2: Cancel units
mg cancels, leaving tablets.
Step 3: Calculate
,[
650 \div 325 = 2
]
Administer 2 tablets.
Medication Safety Note:
Always verify the tablet strength before administration to
prevent underdosing or overdosing.
Question 2 (Easy) – Liquid Medication Calculation
A child is prescribed 240 mg of an oral antibiotic. The
suspension is labeled 120 mg/5 mL. How many milliliters should
the nurse administer?
A. 5 mL
B. 8 mL
C. 10 mL
D. 12 mL
Correct Answer: C. 10 mL
Rationale:
Step 1:
, [
240\ mg \times \frac{5\ mL}{120\ mg}
]
Step 2:
Cancel mg.
Step 3:
[
240 \times 5 =1200
]
[
1200 \div120=10
]
Administer 10 mL.
Medication Safety Note:
Use an oral dosing syringe for accurate measurement.
Question 3 (Easy) – Metric Conversion
Convert 2.5 g to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
