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 patient is prescribed amoxicillin 750 mg PO. The available
tablets are 250 mg each. How many tablets should the nurse
administer?
A. 2 tablets
B. 2.5 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: C
Rationale:
Step 1: Set up dimensional analysis
[
750\ \text{mg} \times \frac{1\ \text{tablet}}{250\ \text{mg}}
]
Step 2: Cancel units
mg cancels, leaving tablets.
Step 3: Solve
[
750 \div 250 = 3
]
Administer 3 tablets.
,Medication Safety Note:
Always verify that the tablet strength matches the medication
administration record before giving multiple tablets.
Question 2 (Easy) – Liquid Medication
The provider orders cephalexin 500 mg PO. The suspension
available is 250 mg/5 mL.
How many milliliters should the nurse administer?
A. 5 mL
B. 8 mL
C. 10 mL
D. 15 mL
Correct Answer: C
Rationale:
Step 1
[
500\ \text{mg} \times \frac{5\ \text{mL}}{250\ \text{mg}}
]
Step 2
Cancel mg.
, Step 3
[
500 \times 5 =2500
]
[
2500 \div250=10\ \text{mL}
]
Medication Safety Note:
Use an oral syringe for accurate liquid medication
measurement.
Question 3 (Easy) – Metric Conversion
Convert 2.5 g to mg.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C
Rationale:
Step 1
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy) – Oral Tablet Calculation
A patient is prescribed amoxicillin 750 mg PO. The available
tablets are 250 mg each. How many tablets should the nurse
administer?
A. 2 tablets
B. 2.5 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: C
Rationale:
Step 1: Set up dimensional analysis
[
750\ \text{mg} \times \frac{1\ \text{tablet}}{250\ \text{mg}}
]
Step 2: Cancel units
mg cancels, leaving tablets.
Step 3: Solve
[
750 \div 250 = 3
]
Administer 3 tablets.
,Medication Safety Note:
Always verify that the tablet strength matches the medication
administration record before giving multiple tablets.
Question 2 (Easy) – Liquid Medication
The provider orders cephalexin 500 mg PO. The suspension
available is 250 mg/5 mL.
How many milliliters should the nurse administer?
A. 5 mL
B. 8 mL
C. 10 mL
D. 15 mL
Correct Answer: C
Rationale:
Step 1
[
500\ \text{mg} \times \frac{5\ \text{mL}}{250\ \text{mg}}
]
Step 2
Cancel mg.
, Step 3
[
500 \times 5 =2500
]
[
2500 \div250=10\ \text{mL}
]
Medication Safety Note:
Use an oral syringe for accurate liquid medication
measurement.
Question 3 (Easy) – Metric Conversion
Convert 2.5 g to mg.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C
Rationale:
Step 1
