Fall Semester 2026–2027 PED320 – Pediatric
Pharmacology Updated 2026 | 190+ Questions and
Answers | Pediatric Pharmacology Comprehensive
Study Guide, Practice Exam, Exam Prep Test Bank,
Pediatric Medication Administration, Dosage
Calculations, Drug Classifications, Neonatal
Pharmacology, Pediatric Emergencies, Immunizations,
Safe Medication Practices, Adverse Drug Reactions,
Clinical Judgment, NCLEX-RN Review, Detailed
Rationales and Complete Revision Material
Question 1: A 4-year-old child with a history of febrile seizures is brought to
the emergency department actively seizing. The seizure has lasted 12 minutes.
Which of the following is the most appropriate first-line pharmacologic
intervention for acute management?
A. Intravenous levetiracetam 20 mg/kg
B. Intravenous phenytoin 20 mg/kg
C. Intravenous lorazepam 0.1 mg/kg
D. Oral diazepam 0.5 mg/kg
CORRECT ANSWER: C. Intravenous lorazepam 0.1 mg/kg
Rationale: Benzodiazepines, specifically IV lorazepam, are the first-line treatment for
status epilepticus in children. Lorazepam is preferred over diazepam due to its longer
duration of action and lower risk of redosing. Phenytoin and levetiracetam are second-
line agents used for refractory seizures.
Question 2: Which of the following is the primary mechanism of action of
acetaminophen in treating fever and pain in the pediatric population?
A. Inhibition of cyclooxygenase-1 (COX-1) centrally
B. Inhibition of cyclooxygenase-2 (COX-2) peripherally
C. Central inhibition of prostaglandin synthesis via a COX-3 pathway
D. Blockade of sodium channels in the dorsal horn
CORRECT ANSWER: C. Central inhibition of prostaglandin synthesis via a
COX-3 pathway
Rationale: Acetaminophen is believed to exert its antipyretic and analgesic effects
primarily through central inhibition of prostaglandin synthesis, likely via a COX-3
variant. It has weak peripheral anti-inflammatory effects and does not significantly
inhibit COX-1 or COX-2 in the periphery.
,Question 3: A 6-month-old infant requires antibiotic therapy for a urinary tract
infection. Which of the following antibiotics is contraindicated in this age
group due to the risk of tooth discoloration and enamel hypoplasia?
A. Amoxicillin
B. Cephalexin
C. Tetracycline
D. Trimethoprim-sulfamethoxazole
CORRECT ANSWER: C. Tetracycline
Rationale: Tetracyclines are contraindicated in children under 8 years of age because
they bind to calcium in developing teeth and bones, leading to permanent tooth
discoloration and enamel hypoplasia. Amoxicillin and cephalexin are safe alternatives.
Question 4: The pediatric nurse is educating the parents of a 2-year-old on the
administration of oral liquid medications. Which strategy is most appropriate
to ensure accurate dosing?
A. Use a standard household teaspoon to administer the dose
B. Mix the medication in a full bottle of juice to mask the taste
C. Use the calibrated oral syringe provided with the medication
D. Administer the medication only if the child requests it
CORRECT ANSWER: C. Use the calibrated oral syringe provided with the
medication
Rationale: An oral syringe provides the most accurate measurement for liquid
medications in children. Household spoons vary in size and can lead to dosing errors.
Mixing with a full bottle of liquid may result in incomplete ingestion of the full dose.
Question 5: A 10-year-old is prescribed methylphenidate for attention-
deficit/hyperactivity disorder (ADHD). Which of the following is a common
and expected side effect of this medication?
A. Weight gain
B. Sedation
C. Insomnia and decreased appetite
D. Bradycardia
CORRECT ANSWER: C. Insomnia and decreased appetite
Rationale: Methylphenidate is a central nervous system stimulant that commonly causes
insomnia, decreased appetite, and weight loss in children. It does not cause sedation or
bradycardia; in fact, it can cause tachycardia and elevated blood pressure.
,Question 6: A 3-year-old has a persistent cough and is diagnosed with croup.
Which of the following corticosteroids is most commonly administered via
nebulization to reduce airway inflammation?
A. Prednisolone
B. Dexamethasone
C. Budesonide
D. Hydrocortisone
CORRECT ANSWER: C. Budesonide
Rationale: Budesonide is an inhaled corticosteroid often used via nebulization for croup
to decrease subglottic inflammation. Dexamethasone and prednisolone are systemic
corticosteroids commonly given orally or intramuscularly, not via nebulization.
Question 7: Which of the following parameters is most critical to monitor
when a pediatric patient is receiving intravenous vancomycin?
A. Serum creatinine levels
B. Serum liver enzyme levels
C. Serum potassium levels
D. Hemoglobin and hematocrit
CORRECT ANSWER: A. Serum creatinine levels
Rationale: Vancomycin is nephrotoxic and excreted renally. Monitoring serum creatinine
and trough levels is essential to prevent acute kidney injury, especially in pediatric
patients with immature or compromised renal function.
Question 8: In the treatment of a pediatric patient with acute asthma
exacerbation, which of the following medications is administered for its
bronchodilatory effect via stimulation of beta-2 adrenergic receptors?
A. Montelukast
B. Albuterol
C. Cromolyn sodium
D. Ipratropium bromide
CORRECT ANSWER: B. Albuterol
Rationale: Albuterol is a selective short-acting beta-2 agonist (SABA) that causes
bronchodilation. It is the first-line treatment for acute asthma exacerbations.
Montelukast is a leukotriene receptor antagonist for maintenance, and ipratropium is an
anticholinergic used as adjunct therapy.
, Question 9: A 7-year-old child on phenytoin for a seizure disorder develops
gingival hyperplasia. The parent asks about the cause. What is the most
accurate explanation?
A. It is an allergic reaction requiring immediate discontinuation
B. It results from a high sodium intake
C. It is a known side effect due to drug accumulation in gingival fibroblasts
D. It indicates a toxic level of phenytoin in the blood
CORRECT ANSWER: C. It is a known side effect due to drug accumulation in
gingival fibroblasts
Rationale: Gingival hyperplasia is a well-documented side effect of phenytoin, occurring
due to the drug's accumulation in the gingival tissues and its effect on fibroblast
proliferation and collagen synthesis. It is not an allergic reaction or a sign of toxicity.
Question 10: What is the mechanism of action of ondansetron, commonly used
for chemotherapy-induced nausea in children?
A. Dopamine D2 receptor antagonist
B. Serotonin 5-HT3 receptor antagonist
C. Histamine H1 receptor antagonist
D. Neurokinin-1 receptor antagonist
CORRECT ANSWER: B. Serotonin 5-HT3 receptor antagonist
Rationale: Ondansetron is a highly selective serotonin 5-HT3 receptor antagonist. It
works by blocking serotonin receptors in the chemoreceptor trigger zone and
gastrointestinal tract to prevent nausea and vomiting.
Question 11: A preterm neonate in the NICU is diagnosed with a patent ductus
arteriosus (PDA). Which medication is commonly used to promote ductal
closure?
A. Prostaglandin E1
B. Indomethacin
C. Furosemide
D. Morphine
CORRECT ANSWER: B. Indomethacin
Rationale: Indomethacin is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits
prostaglandin synthesis, causing constriction and closure of the patent ductus arteriosus.
Prostaglandin E1 is used to maintain ductal patency in ductus-dependent congenital
heart defects.
Pharmacology Updated 2026 | 190+ Questions and
Answers | Pediatric Pharmacology Comprehensive
Study Guide, Practice Exam, Exam Prep Test Bank,
Pediatric Medication Administration, Dosage
Calculations, Drug Classifications, Neonatal
Pharmacology, Pediatric Emergencies, Immunizations,
Safe Medication Practices, Adverse Drug Reactions,
Clinical Judgment, NCLEX-RN Review, Detailed
Rationales and Complete Revision Material
Question 1: A 4-year-old child with a history of febrile seizures is brought to
the emergency department actively seizing. The seizure has lasted 12 minutes.
Which of the following is the most appropriate first-line pharmacologic
intervention for acute management?
A. Intravenous levetiracetam 20 mg/kg
B. Intravenous phenytoin 20 mg/kg
C. Intravenous lorazepam 0.1 mg/kg
D. Oral diazepam 0.5 mg/kg
CORRECT ANSWER: C. Intravenous lorazepam 0.1 mg/kg
Rationale: Benzodiazepines, specifically IV lorazepam, are the first-line treatment for
status epilepticus in children. Lorazepam is preferred over diazepam due to its longer
duration of action and lower risk of redosing. Phenytoin and levetiracetam are second-
line agents used for refractory seizures.
Question 2: Which of the following is the primary mechanism of action of
acetaminophen in treating fever and pain in the pediatric population?
A. Inhibition of cyclooxygenase-1 (COX-1) centrally
B. Inhibition of cyclooxygenase-2 (COX-2) peripherally
C. Central inhibition of prostaglandin synthesis via a COX-3 pathway
D. Blockade of sodium channels in the dorsal horn
CORRECT ANSWER: C. Central inhibition of prostaglandin synthesis via a
COX-3 pathway
Rationale: Acetaminophen is believed to exert its antipyretic and analgesic effects
primarily through central inhibition of prostaglandin synthesis, likely via a COX-3
variant. It has weak peripheral anti-inflammatory effects and does not significantly
inhibit COX-1 or COX-2 in the periphery.
,Question 3: A 6-month-old infant requires antibiotic therapy for a urinary tract
infection. Which of the following antibiotics is contraindicated in this age
group due to the risk of tooth discoloration and enamel hypoplasia?
A. Amoxicillin
B. Cephalexin
C. Tetracycline
D. Trimethoprim-sulfamethoxazole
CORRECT ANSWER: C. Tetracycline
Rationale: Tetracyclines are contraindicated in children under 8 years of age because
they bind to calcium in developing teeth and bones, leading to permanent tooth
discoloration and enamel hypoplasia. Amoxicillin and cephalexin are safe alternatives.
Question 4: The pediatric nurse is educating the parents of a 2-year-old on the
administration of oral liquid medications. Which strategy is most appropriate
to ensure accurate dosing?
A. Use a standard household teaspoon to administer the dose
B. Mix the medication in a full bottle of juice to mask the taste
C. Use the calibrated oral syringe provided with the medication
D. Administer the medication only if the child requests it
CORRECT ANSWER: C. Use the calibrated oral syringe provided with the
medication
Rationale: An oral syringe provides the most accurate measurement for liquid
medications in children. Household spoons vary in size and can lead to dosing errors.
Mixing with a full bottle of liquid may result in incomplete ingestion of the full dose.
Question 5: A 10-year-old is prescribed methylphenidate for attention-
deficit/hyperactivity disorder (ADHD). Which of the following is a common
and expected side effect of this medication?
A. Weight gain
B. Sedation
C. Insomnia and decreased appetite
D. Bradycardia
CORRECT ANSWER: C. Insomnia and decreased appetite
Rationale: Methylphenidate is a central nervous system stimulant that commonly causes
insomnia, decreased appetite, and weight loss in children. It does not cause sedation or
bradycardia; in fact, it can cause tachycardia and elevated blood pressure.
,Question 6: A 3-year-old has a persistent cough and is diagnosed with croup.
Which of the following corticosteroids is most commonly administered via
nebulization to reduce airway inflammation?
A. Prednisolone
B. Dexamethasone
C. Budesonide
D. Hydrocortisone
CORRECT ANSWER: C. Budesonide
Rationale: Budesonide is an inhaled corticosteroid often used via nebulization for croup
to decrease subglottic inflammation. Dexamethasone and prednisolone are systemic
corticosteroids commonly given orally or intramuscularly, not via nebulization.
Question 7: Which of the following parameters is most critical to monitor
when a pediatric patient is receiving intravenous vancomycin?
A. Serum creatinine levels
B. Serum liver enzyme levels
C. Serum potassium levels
D. Hemoglobin and hematocrit
CORRECT ANSWER: A. Serum creatinine levels
Rationale: Vancomycin is nephrotoxic and excreted renally. Monitoring serum creatinine
and trough levels is essential to prevent acute kidney injury, especially in pediatric
patients with immature or compromised renal function.
Question 8: In the treatment of a pediatric patient with acute asthma
exacerbation, which of the following medications is administered for its
bronchodilatory effect via stimulation of beta-2 adrenergic receptors?
A. Montelukast
B. Albuterol
C. Cromolyn sodium
D. Ipratropium bromide
CORRECT ANSWER: B. Albuterol
Rationale: Albuterol is a selective short-acting beta-2 agonist (SABA) that causes
bronchodilation. It is the first-line treatment for acute asthma exacerbations.
Montelukast is a leukotriene receptor antagonist for maintenance, and ipratropium is an
anticholinergic used as adjunct therapy.
, Question 9: A 7-year-old child on phenytoin for a seizure disorder develops
gingival hyperplasia. The parent asks about the cause. What is the most
accurate explanation?
A. It is an allergic reaction requiring immediate discontinuation
B. It results from a high sodium intake
C. It is a known side effect due to drug accumulation in gingival fibroblasts
D. It indicates a toxic level of phenytoin in the blood
CORRECT ANSWER: C. It is a known side effect due to drug accumulation in
gingival fibroblasts
Rationale: Gingival hyperplasia is a well-documented side effect of phenytoin, occurring
due to the drug's accumulation in the gingival tissues and its effect on fibroblast
proliferation and collagen synthesis. It is not an allergic reaction or a sign of toxicity.
Question 10: What is the mechanism of action of ondansetron, commonly used
for chemotherapy-induced nausea in children?
A. Dopamine D2 receptor antagonist
B. Serotonin 5-HT3 receptor antagonist
C. Histamine H1 receptor antagonist
D. Neurokinin-1 receptor antagonist
CORRECT ANSWER: B. Serotonin 5-HT3 receptor antagonist
Rationale: Ondansetron is a highly selective serotonin 5-HT3 receptor antagonist. It
works by blocking serotonin receptors in the chemoreceptor trigger zone and
gastrointestinal tract to prevent nausea and vomiting.
Question 11: A preterm neonate in the NICU is diagnosed with a patent ductus
arteriosus (PDA). Which medication is commonly used to promote ductal
closure?
A. Prostaglandin E1
B. Indomethacin
C. Furosemide
D. Morphine
CORRECT ANSWER: B. Indomethacin
Rationale: Indomethacin is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits
prostaglandin synthesis, causing constriction and closure of the patent ductus arteriosus.
Prostaglandin E1 is used to maintain ductal patency in ductus-dependent congenital
heart defects.
