LEHNE PHARM PEDIATRIC PHARMACOTHERAPY
EXAM QUESTION AND ANSWERS LATEST VERSION
100% A+ Graded .
1. Which physiological characteristic is most responsible for altered drug
distribution in neonates?
A. Increased plasma protein binding
B. Decreased total body water
C. Increased extracellular water content
D. Increased hepatic enzyme activity
Correct Answer: C
Rationale: Neonates have a higher proportion of extracellular and total
body water, increasing distribution of water-soluble drugs.
2. The most accurate statement about drug metabolism in neonates is:
A. Drug metabolism is faster than adults
B. Phase II metabolism is fully mature at birth
C. Hepatic enzyme systems are immature at birth
D. Renal clearance is identical to adults
Correct Answer: C
Rationale: Neonatal hepatic enzymes (especially CYP450) are immature,
reducing metabolism.
3. Which drug is contraindicated in infants under 2 months due to risk of
kernicterus?
A. Paracetamol
B. Co-trimoxazole
C. Amoxicillin
D. Ceftriaxone
Correct Answer: B
Rationale: Sulfonamides displace bilirubin leading to kernicterus.
,4. The primary route of drug elimination in neonates is:
A. Pulmonary excretion
B. Renal excretion
C. Biliary excretion
D. Sweat glands
Correct Answer: B
Rationale: Renal function is immature but still primary elimination route.
5. Which pharmacokinetic parameter is most increased in neonates?
A. Hepatic clearance
B. Volume of distribution
C. Plasma protein binding
D. Glomerular filtration rate
Correct Answer: B
Rationale: Higher body water increases Vd of hydrophilic drugs.
6. The safest analgesic in infants is:
A. Aspirin
B. Ibuprofen (neonates)
C. Paracetamol
D. Naproxen
Correct Answer: C
Rationale: Paracetamol is safest when dosed appropriately.
7. Which adverse effect is most associated with tetracyclines in children?
A. Renal failure
B. Teeth discoloration
C. Hearing loss
D. Hypoglycemia
Correct Answer: B
Rationale: Tetracyclines deposit in developing teeth and bones.
8. Neonatal gastric pH is generally:
A. Highly acidic
B. Neutral to high
, C. Extremely low
D. Constant with age
Correct Answer: B
Rationale: Higher gastric pH affects drug absorption.
9. Which factor most reduces oral drug absorption in neonates?
A. Increased gastric motility
B. Delayed gastric emptying
C. Increased bile salts
D. Increased enzyme activity
Correct Answer: B
Rationale: Slower gastric emptying delays absorption.
10.A drug with high lipid solubility in neonates will have:
A. Reduced distribution
B. Increased accumulation
C. No change in Vd
D. Increased elimination
Correct Answer: B
Rationale: High lipid solubility + immature metabolism → accumulation.
11.Which enzyme system matures last in children?
A. Phase I CYP450
B. Alcohol dehydrogenase
C. Phase II glucuronidation
D. Renal tubular secretion
Correct Answer: C
Rationale: Glucuronidation matures slowly in early life.
12.The safest NSAID for short-term pediatric use is:
A. Aspirin
B. Diclofenac
C. Ibuprofen
D. Ketorolac
EXAM QUESTION AND ANSWERS LATEST VERSION
100% A+ Graded .
1. Which physiological characteristic is most responsible for altered drug
distribution in neonates?
A. Increased plasma protein binding
B. Decreased total body water
C. Increased extracellular water content
D. Increased hepatic enzyme activity
Correct Answer: C
Rationale: Neonates have a higher proportion of extracellular and total
body water, increasing distribution of water-soluble drugs.
2. The most accurate statement about drug metabolism in neonates is:
A. Drug metabolism is faster than adults
B. Phase II metabolism is fully mature at birth
C. Hepatic enzyme systems are immature at birth
D. Renal clearance is identical to adults
Correct Answer: C
Rationale: Neonatal hepatic enzymes (especially CYP450) are immature,
reducing metabolism.
3. Which drug is contraindicated in infants under 2 months due to risk of
kernicterus?
A. Paracetamol
B. Co-trimoxazole
C. Amoxicillin
D. Ceftriaxone
Correct Answer: B
Rationale: Sulfonamides displace bilirubin leading to kernicterus.
,4. The primary route of drug elimination in neonates is:
A. Pulmonary excretion
B. Renal excretion
C. Biliary excretion
D. Sweat glands
Correct Answer: B
Rationale: Renal function is immature but still primary elimination route.
5. Which pharmacokinetic parameter is most increased in neonates?
A. Hepatic clearance
B. Volume of distribution
C. Plasma protein binding
D. Glomerular filtration rate
Correct Answer: B
Rationale: Higher body water increases Vd of hydrophilic drugs.
6. The safest analgesic in infants is:
A. Aspirin
B. Ibuprofen (neonates)
C. Paracetamol
D. Naproxen
Correct Answer: C
Rationale: Paracetamol is safest when dosed appropriately.
7. Which adverse effect is most associated with tetracyclines in children?
A. Renal failure
B. Teeth discoloration
C. Hearing loss
D. Hypoglycemia
Correct Answer: B
Rationale: Tetracyclines deposit in developing teeth and bones.
8. Neonatal gastric pH is generally:
A. Highly acidic
B. Neutral to high
, C. Extremely low
D. Constant with age
Correct Answer: B
Rationale: Higher gastric pH affects drug absorption.
9. Which factor most reduces oral drug absorption in neonates?
A. Increased gastric motility
B. Delayed gastric emptying
C. Increased bile salts
D. Increased enzyme activity
Correct Answer: B
Rationale: Slower gastric emptying delays absorption.
10.A drug with high lipid solubility in neonates will have:
A. Reduced distribution
B. Increased accumulation
C. No change in Vd
D. Increased elimination
Correct Answer: B
Rationale: High lipid solubility + immature metabolism → accumulation.
11.Which enzyme system matures last in children?
A. Phase I CYP450
B. Alcohol dehydrogenase
C. Phase II glucuronidation
D. Renal tubular secretion
Correct Answer: C
Rationale: Glucuronidation matures slowly in early life.
12.The safest NSAID for short-term pediatric use is:
A. Aspirin
B. Diclofenac
C. Ibuprofen
D. Ketorolac
