DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy – Oral Dosage Calculation)
A patient is prescribed amoxicillin 750 mg PO. The medication
available is 250 mg capsules.
How many capsules should the nurse administer?
A. 2 capsules
B. 2.5 capsules
C. 3 capsules
D. 4 capsules
Correct Answer: C
Rationale:
Step 1: Set up dimensional analysis
[
750\ \text{mg} \times \frac{1\ \text{capsule}}{250\ \text{mg}}
]
Step 2: Cancel units
mg cancels, leaving capsules.
Step 3: Calculate
[
750 \div 250 = 3
]
,Administer 3 capsules.
Medication Safety Note:
Always verify that capsule formulations may be given as
ordered. Never split capsules unless specifically designed for
that purpose.
Question 2 (Easy – Liquid Medication)
The provider orders acetaminophen 650 mg PO.
Available:
Acetaminophen suspension 160 mg/5 mL
How many milliliters should the nurse administer?
A. 15.3 mL
B. 20.3 mL
C. 18.5 mL
D. 22.5 mL
Correct Answer: B
Rationale:
Step 1
[
650\ \text{mg} \times
, \frac{5\ \text{mL}}{160\ \text{mg}}
]
Step 2
Cancel mg.
Step 3
[
650 \times 5 = 3250
]
[
3250 \div 160 = 20.3\ \text{mL}
]
Medication Safety Note:
Use an oral syringe for accurate measurement of liquid
medications.
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
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy – Oral Dosage Calculation)
A patient is prescribed amoxicillin 750 mg PO. The medication
available is 250 mg capsules.
How many capsules should the nurse administer?
A. 2 capsules
B. 2.5 capsules
C. 3 capsules
D. 4 capsules
Correct Answer: C
Rationale:
Step 1: Set up dimensional analysis
[
750\ \text{mg} \times \frac{1\ \text{capsule}}{250\ \text{mg}}
]
Step 2: Cancel units
mg cancels, leaving capsules.
Step 3: Calculate
[
750 \div 250 = 3
]
,Administer 3 capsules.
Medication Safety Note:
Always verify that capsule formulations may be given as
ordered. Never split capsules unless specifically designed for
that purpose.
Question 2 (Easy – Liquid Medication)
The provider orders acetaminophen 650 mg PO.
Available:
Acetaminophen suspension 160 mg/5 mL
How many milliliters should the nurse administer?
A. 15.3 mL
B. 20.3 mL
C. 18.5 mL
D. 22.5 mL
Correct Answer: B
Rationale:
Step 1
[
650\ \text{mg} \times
, \frac{5\ \text{mL}}{160\ \text{mg}}
]
Step 2
Cancel mg.
Step 3
[
650 \times 5 = 3250
]
[
3250 \div 160 = 20.3\ \text{mL}
]
Medication Safety Note:
Use an oral syringe for accurate measurement of liquid
medications.
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
