PHARMACOLOGY NURS 251 MODULE 10 EXAM
2026/2027 | Portage Learning ABCnursing Geneva
College | Verified Edition Questions & Answers | Pass
Guaranteed - A+ Graded
Section 1: Pediatric Pharmacology (Questions 1-25)
Q1: A nurse is preparing to administer an oral medication to a 10-month-old infant.
Which administration technique is most appropriate?
A. Mix the medication in a full 8 oz bottle of formula to ensure complete ingestion.
B. Use a household teaspoon to measure the liquid accurately.
C. Use an oral syringe and slowly squirt the medication into the inner cheek.
[CORRECT]
D. Tell the parents the medication tastes like candy to improve compliance.
Correct Answer: C
Rationale: Oral syringes provide the most accurate measurement and allow for
controlled administration into the inner cheek (buccal cavity), preventing choking.
Medications should never be mixed in a full bottle because if the infant does not finish it,
the exact dose is unknown. Household spoons are inaccurate, and calling medicine
"candy" is dangerous as it encourages accidental ingestion. Module 10 Exam Insight:
Portage learning heavily tests safe medication administration in pediatrics, specifically
the use of oral syringes over cups or teaspoons.
Q2: A 2-year-old child weighing 12 kg is prescribed amoxicillin 80 mg/kg/day divided
into two doses. What is the correct amount per dose?
A. 240 mg
B. 480 mg [CORRECT]
C. 960 mg
D. 120 mg
Correct Answer: B
Rationale: The total daily dose is calculated by multiplying weight (12 kg) by the
prescribed amount (80 mg/kg/day), which equals 960 mg/day. Dividing this total daily
dose by 2 (for BID dosing) results in 480 mg per dose. Module 10 Exam Insight: Always
divide the total daily dose by the number of doses per day to avoid administering a
massive overdose.
Q3: A full-term neonate is experiencing a severe infection and requires chloramphenicol
therapy. The nurse monitors the neonate closely for which adverse effect due to
immature hepatic metabolism?
,A. Reye's syndrome
B. Gray baby syndrome [CORRECT]
C. Kernicterus
D. Tetracycline discoloration
Correct Answer: B
Rationale: Neonates have immature glucuronidation pathways (Phase II metabolism).
Chloramphenicol cannot be adequately metabolized, leading to toxic accumulation
causing gray baby syndrome, characterized by cyanosis, hypothermia, abdominal
distention, and vascular collapse. Reye's is from aspirin, kernicterus is from bilirubin
displacement, and tetracycline causes teeth staining. Module 10 Exam Insight: Connect
specific drugs to neonatal toxicities based on the specific immature metabolic pathway
(glucuronidation for chloramphenicol).
Q4: Why do neonates require a higher mg/kg dose of water-soluble drugs (e.g.,
aminoglycosides) compared to adults?
A. Neonates have decreased gastric acid secretion.
B. Neonates have a higher percentage of total body water (70-80%). [CORRECT]
C. Neonates have increased protein binding.
D. Neonates have a faster glomerular filtration rate.
Correct Answer: B
Rationale: Neonates have a much higher proportion of total body water (70-80%)
compared to adults (50-60%). Water-soluble drugs distribute throughout this larger
volume, requiring a higher mg/kg dose to achieve therapeutic serum concentrations.
Neonates actually have decreased protein binding and decreased GFR. Module 10
Exam Insight: Memorize the inverse relationship between body composition and drug
distribution in neonates versus geriatric patients.
Q5: A 6-month-old infant has a fever of 102°F. Which antipyretic is contraindicated due
to the risk of Reye's syndrome if the infant has a viral illness?
A. Ibuprofen
B. Acetaminophen
C. Aspirin [CORRECT]
D. Naproxen
Correct Answer: C
Rationale: Aspirin (salicylates) is strictly contraindicated in pediatric patients (<19 years)
with viral infections (influenza, varicella) due to the risk of Reye's syndrome, a
life-threatening condition causing hepatic encephalopathy. Acetaminophen and
ibuprofen are safe alternatives. Module 10 Exam Insight: Reye's syndrome is a classic
"absolute contraindication" board question for aspirin in pediatrics.
,Q6: A nurse is calculating a pediatric dose using the Body Surface Area (BSA) method.
Which formula is correct?
A. BSA = (height in cm x weight in kg) / 3600
B. BSA = √(height in cm x weight in kg / 3600) [CORRECT]
C. BSA = weight in kg / (height in cm x 3600)
D. BSA = √(height in inches x weight in lbs / 3600)
Correct Answer: B
Rationale: The correct formula for calculating BSA in square meters using metric
measurements is the square root of (height in centimeters multiplied by weight in
kilograms, divided by 3600). BSA is the most accurate method for dosing chemotherapy
and narrow therapeutic index drugs. Module 10 Exam Insight: Do not confuse the BSA
formula with simple multiplication; remember the square root symbol.
Q7: A nurse is administering an intramuscular vaccine to a 15-month-old toddler. Which
site and needle length are most appropriate?
A. Deltoid muscle with a 5/8-inch needle
B. Vastus lateralis with a 1-inch needle [CORRECT]
C. Ventrogluteal site with a 1.5-inch needle
D. Dorsogluteal site with a 5/8-inch needle
Correct Answer: B
Rationale: For infants and toddlers (up to 2-3 years), the vastus lateralis is the preferred
IM site because it is the largest and most developed muscle mass. A 1-inch needle is
generally appropriate for this age group to ensure the medication reaches the muscle.
The deltoid can be used for toddlers if the muscle mass is adequate, but vastus lateralis
is the gold standard. The dorsogluteal site is never used in children due to the risk of
sciatic nerve injury. Module 10 Exam Insight: Age dictates the IM site: vastus lateralis for
infants/toddlers, deltoid for older children.
Q8: A nurse is reviewing a medication order for a 4-year-old child: "Amoxicillin 500 mg
PO BID." The child weighs 15 kg. The recommended dose is 20-40 mg/kg/day. What is
the nurse's best action?
A. Administer the dose as ordered.
B. Hold the medication and call the provider; the dose exceeds the maximum
recommended. [CORRECT]
C. Administer half the dose.
D. Convert the dose to mg/kg and administer.
Correct Answer: B
Rationale: The ordered dose is 1000 mg/day (500 mg x 2). Dividing 1000 mg by 15 kg
results in 66.6 mg/kg/day, which severely exceeds the safe recommended range of
20-40 mg/kg/day. The nurse must hold the medication and clarify the order with the
provider to prevent toxicity. Module 10 Exam Insight: Pediatric dosing errors often
, involve miscalculating mg/kg/day. Always verify the total daily dose against standard
references before administering.
Q9: A 3-year-old child is prescribed a topical corticosteroid for severe eczema. Why is
the child at a higher risk for systemic toxicity compared to an adult using the same
preparation?
A. The child has thinner skin and a higher surface area-to-body weight ratio.
[CORRECT]
B. The child's sebaceous glands are more active.
C. The child has a faster metabolic rate.
D. The child's immune system is hyperreactive.
Correct Answer: A
Rationale: Pediatric patients have thinner, more permeable skin and a larger body
surface area relative to their body weight compared to adults. This leads to significantly
increased percutaneous absorption of topical medications, increasing the risk of
systemic toxicity (e.g., adrenal suppression from topical steroids). Module 10 Exam
Insight: Topical medications are not benign in pediatrics; always consider the surface
area-to-weight ratio.
Q10: A premature neonate is receiving a highly protein-bound drug (e.g., phenytoin).
Which pathophysiologic principle explains the increased risk of toxicity in this patient?
A. Increased albumin levels
B. Decreased free fatty acids
C. Decreased protein binding capacity and bilirubin displacement [CORRECT]
D. Immature blood-brain barrier exclusion
Correct Answer: C
Rationale: Neonates have lower total plasma protein (albumin) levels and higher levels
of free fatty acids and bilirubin, which compete with drugs for binding sites. This results
in a higher fraction of unbound (free) active drug, increasing the pharmacologic effect
and risk of toxicity. An immature BBB would actually increase CNS penetration, but
protein binding is the primary issue for phenytoin. Module 10 Exam Insight: "Free drug =
active drug." Lower albumin in neonates/geriatrics directly increases free drug levels.
Q11: A nurse is preparing to administer an IV medication to a critically ill neonate. Which
technique is required to ensure accurate volume delivery in a low-flow situation?
A. Use a macro-drip set.
B. Administer as a rapid IV push.
C. Use a volume-controlled infusion (burette or syringe pump). [CORRECT]
D. Mix the medication in a 500 mL bag of normal saline.
Correct Answer: C
2026/2027 | Portage Learning ABCnursing Geneva
College | Verified Edition Questions & Answers | Pass
Guaranteed - A+ Graded
Section 1: Pediatric Pharmacology (Questions 1-25)
Q1: A nurse is preparing to administer an oral medication to a 10-month-old infant.
Which administration technique is most appropriate?
A. Mix the medication in a full 8 oz bottle of formula to ensure complete ingestion.
B. Use a household teaspoon to measure the liquid accurately.
C. Use an oral syringe and slowly squirt the medication into the inner cheek.
[CORRECT]
D. Tell the parents the medication tastes like candy to improve compliance.
Correct Answer: C
Rationale: Oral syringes provide the most accurate measurement and allow for
controlled administration into the inner cheek (buccal cavity), preventing choking.
Medications should never be mixed in a full bottle because if the infant does not finish it,
the exact dose is unknown. Household spoons are inaccurate, and calling medicine
"candy" is dangerous as it encourages accidental ingestion. Module 10 Exam Insight:
Portage learning heavily tests safe medication administration in pediatrics, specifically
the use of oral syringes over cups or teaspoons.
Q2: A 2-year-old child weighing 12 kg is prescribed amoxicillin 80 mg/kg/day divided
into two doses. What is the correct amount per dose?
A. 240 mg
B. 480 mg [CORRECT]
C. 960 mg
D. 120 mg
Correct Answer: B
Rationale: The total daily dose is calculated by multiplying weight (12 kg) by the
prescribed amount (80 mg/kg/day), which equals 960 mg/day. Dividing this total daily
dose by 2 (for BID dosing) results in 480 mg per dose. Module 10 Exam Insight: Always
divide the total daily dose by the number of doses per day to avoid administering a
massive overdose.
Q3: A full-term neonate is experiencing a severe infection and requires chloramphenicol
therapy. The nurse monitors the neonate closely for which adverse effect due to
immature hepatic metabolism?
,A. Reye's syndrome
B. Gray baby syndrome [CORRECT]
C. Kernicterus
D. Tetracycline discoloration
Correct Answer: B
Rationale: Neonates have immature glucuronidation pathways (Phase II metabolism).
Chloramphenicol cannot be adequately metabolized, leading to toxic accumulation
causing gray baby syndrome, characterized by cyanosis, hypothermia, abdominal
distention, and vascular collapse. Reye's is from aspirin, kernicterus is from bilirubin
displacement, and tetracycline causes teeth staining. Module 10 Exam Insight: Connect
specific drugs to neonatal toxicities based on the specific immature metabolic pathway
(glucuronidation for chloramphenicol).
Q4: Why do neonates require a higher mg/kg dose of water-soluble drugs (e.g.,
aminoglycosides) compared to adults?
A. Neonates have decreased gastric acid secretion.
B. Neonates have a higher percentage of total body water (70-80%). [CORRECT]
C. Neonates have increased protein binding.
D. Neonates have a faster glomerular filtration rate.
Correct Answer: B
Rationale: Neonates have a much higher proportion of total body water (70-80%)
compared to adults (50-60%). Water-soluble drugs distribute throughout this larger
volume, requiring a higher mg/kg dose to achieve therapeutic serum concentrations.
Neonates actually have decreased protein binding and decreased GFR. Module 10
Exam Insight: Memorize the inverse relationship between body composition and drug
distribution in neonates versus geriatric patients.
Q5: A 6-month-old infant has a fever of 102°F. Which antipyretic is contraindicated due
to the risk of Reye's syndrome if the infant has a viral illness?
A. Ibuprofen
B. Acetaminophen
C. Aspirin [CORRECT]
D. Naproxen
Correct Answer: C
Rationale: Aspirin (salicylates) is strictly contraindicated in pediatric patients (<19 years)
with viral infections (influenza, varicella) due to the risk of Reye's syndrome, a
life-threatening condition causing hepatic encephalopathy. Acetaminophen and
ibuprofen are safe alternatives. Module 10 Exam Insight: Reye's syndrome is a classic
"absolute contraindication" board question for aspirin in pediatrics.
,Q6: A nurse is calculating a pediatric dose using the Body Surface Area (BSA) method.
Which formula is correct?
A. BSA = (height in cm x weight in kg) / 3600
B. BSA = √(height in cm x weight in kg / 3600) [CORRECT]
C. BSA = weight in kg / (height in cm x 3600)
D. BSA = √(height in inches x weight in lbs / 3600)
Correct Answer: B
Rationale: The correct formula for calculating BSA in square meters using metric
measurements is the square root of (height in centimeters multiplied by weight in
kilograms, divided by 3600). BSA is the most accurate method for dosing chemotherapy
and narrow therapeutic index drugs. Module 10 Exam Insight: Do not confuse the BSA
formula with simple multiplication; remember the square root symbol.
Q7: A nurse is administering an intramuscular vaccine to a 15-month-old toddler. Which
site and needle length are most appropriate?
A. Deltoid muscle with a 5/8-inch needle
B. Vastus lateralis with a 1-inch needle [CORRECT]
C. Ventrogluteal site with a 1.5-inch needle
D. Dorsogluteal site with a 5/8-inch needle
Correct Answer: B
Rationale: For infants and toddlers (up to 2-3 years), the vastus lateralis is the preferred
IM site because it is the largest and most developed muscle mass. A 1-inch needle is
generally appropriate for this age group to ensure the medication reaches the muscle.
The deltoid can be used for toddlers if the muscle mass is adequate, but vastus lateralis
is the gold standard. The dorsogluteal site is never used in children due to the risk of
sciatic nerve injury. Module 10 Exam Insight: Age dictates the IM site: vastus lateralis for
infants/toddlers, deltoid for older children.
Q8: A nurse is reviewing a medication order for a 4-year-old child: "Amoxicillin 500 mg
PO BID." The child weighs 15 kg. The recommended dose is 20-40 mg/kg/day. What is
the nurse's best action?
A. Administer the dose as ordered.
B. Hold the medication and call the provider; the dose exceeds the maximum
recommended. [CORRECT]
C. Administer half the dose.
D. Convert the dose to mg/kg and administer.
Correct Answer: B
Rationale: The ordered dose is 1000 mg/day (500 mg x 2). Dividing 1000 mg by 15 kg
results in 66.6 mg/kg/day, which severely exceeds the safe recommended range of
20-40 mg/kg/day. The nurse must hold the medication and clarify the order with the
provider to prevent toxicity. Module 10 Exam Insight: Pediatric dosing errors often
, involve miscalculating mg/kg/day. Always verify the total daily dose against standard
references before administering.
Q9: A 3-year-old child is prescribed a topical corticosteroid for severe eczema. Why is
the child at a higher risk for systemic toxicity compared to an adult using the same
preparation?
A. The child has thinner skin and a higher surface area-to-body weight ratio.
[CORRECT]
B. The child's sebaceous glands are more active.
C. The child has a faster metabolic rate.
D. The child's immune system is hyperreactive.
Correct Answer: A
Rationale: Pediatric patients have thinner, more permeable skin and a larger body
surface area relative to their body weight compared to adults. This leads to significantly
increased percutaneous absorption of topical medications, increasing the risk of
systemic toxicity (e.g., adrenal suppression from topical steroids). Module 10 Exam
Insight: Topical medications are not benign in pediatrics; always consider the surface
area-to-weight ratio.
Q10: A premature neonate is receiving a highly protein-bound drug (e.g., phenytoin).
Which pathophysiologic principle explains the increased risk of toxicity in this patient?
A. Increased albumin levels
B. Decreased free fatty acids
C. Decreased protein binding capacity and bilirubin displacement [CORRECT]
D. Immature blood-brain barrier exclusion
Correct Answer: C
Rationale: Neonates have lower total plasma protein (albumin) levels and higher levels
of free fatty acids and bilirubin, which compete with drugs for binding sites. This results
in a higher fraction of unbound (free) active drug, increasing the pharmacologic effect
and risk of toxicity. An immature BBB would actually increase CNS penetration, but
protein binding is the primary issue for phenytoin. Module 10 Exam Insight: "Free drug =
active drug." Lower albumin in neonates/geriatrics directly increases free drug levels.
Q11: A nurse is preparing to administer an IV medication to a critically ill neonate. Which
technique is required to ensure accurate volume delivery in a low-flow situation?
A. Use a macro-drip set.
B. Administer as a rapid IV push.
C. Use a volume-controlled infusion (burette or syringe pump). [CORRECT]
D. Mix the medication in a 500 mL bag of normal saline.
Correct Answer: C
