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 provider prescribes amoxicillin 500 mg PO. The available
tablets contain 250 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: Identify the prescribed and available doses.
Ordered = 500 mg
Available = 250 mg/tablet
Step 2: Set up dimensional analysis.
500 mg × (1 tablet / 250 mg) = 2 tablets
Step 3: Solve.
= 2 tablets
Medication Safety Note:
Always verify that scored tablets may be split before
administering partial tablets.
,Question 2 (Easy – Liquid Medication)
A child is prescribed 300 mg of an antibiotic. The suspension is
labeled 150 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. 10 mL
Rationale:
Step 1:
Ordered = 300 mg
Available = 150 mg/5 mL
Step 2:
300 mg × (5 mL /150 mg)
Step 3:
=10 mL
Medication Safety Note:
Always shake oral suspensions thoroughly before measuring the
dose.
, Question 3 (Easy – Unit 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:
1 g = 1,000 mg
Step 2:
2.5 g × (1,000 mg/1 g)
Step 3:
=2,500 mg
Medication Safety Note:
Confusing grams and milligrams may result in a 1,000-fold
dosing error.
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy – Oral Dosage Calculation)
A provider prescribes amoxicillin 500 mg PO. The available
tablets contain 250 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: Identify the prescribed and available doses.
Ordered = 500 mg
Available = 250 mg/tablet
Step 2: Set up dimensional analysis.
500 mg × (1 tablet / 250 mg) = 2 tablets
Step 3: Solve.
= 2 tablets
Medication Safety Note:
Always verify that scored tablets may be split before
administering partial tablets.
,Question 2 (Easy – Liquid Medication)
A child is prescribed 300 mg of an antibiotic. The suspension is
labeled 150 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. 10 mL
Rationale:
Step 1:
Ordered = 300 mg
Available = 150 mg/5 mL
Step 2:
300 mg × (5 mL /150 mg)
Step 3:
=10 mL
Medication Safety Note:
Always shake oral suspensions thoroughly before measuring the
dose.
, Question 3 (Easy – Unit 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:
1 g = 1,000 mg
Step 2:
2.5 g × (1,000 mg/1 g)
Step 3:
=2,500 mg
Medication Safety Note:
Confusing grams and milligrams may result in a 1,000-fold
dosing error.
