NSG 533 Exam 1 Advanced Pharmacology
(2026) – Actual Questions, Verified
Answers with Study Guide | Guarantee
Pass
,Topic 1: Gastrointestinal Pharmacology
Question 1: A patient is diagnosed with helicobacter pylori infection. Which regimen represents
the standard clarithromycin triple therapy?
A) Clarithromycin 500mg BID + amoxicillin 1g BID + PPI BID
B) Clarithromycin 500mg BID + metronidazole 500mg TID + PPI BID
C) Amoxicillin 1g BID + clarithromycin 500mg BID + metronidazole 500mg BID + PPI BID
D) Both A and B are acceptable clarithromycin triple therapy regimens
Correct Answer: D) Both A and B are acceptable clarithromycin triple therapy regimens
Rationale: Clarithromycin triple therapy consists of clarithromycin 500mg BID plus a PPI BID,
with EITHER amoxicillin 1g BID OR metronidazole 500mg TID as the third agent. Option A
represents the amoxicillin-based regimen; Option B represents the metronidazole-based
regimen (used in penicillin-allergic patients or areas with high macrolide resistance). Option C
describes a non-bismuth-based quadruple therapy, not triple therapy.
Question 2: A patient with a documented penicillin allergy requires eradication therapy for H.
pylori. Which of the following regimens is most appropriate?
A) Bismuth quadruple therapy
B) Clarithromycin triple therapy with amoxicillin
C) Levofloxacin triple therapy
D) PPI monotherapy
Correct Answer: A) Bismuth quadruple therapy
Rationale: In patients with penicillin allergy, amoxicillin must be avoided. Bismuth quadruple
therapy (PPI + bismuth + metronidazole + tetracycline) is a recommended first-line or alternative
regimen for H. pylori eradication in this population.
Question 3: Which class of medications is considered the most effective for healing erosive
esophagitis in gastroesophageal reflux disease (GERD)?
A) H2 receptor antagonists
B) Proton pump inhibitors
C) Antacids
,D) Prokinetics
Correct Answer: B) Proton pump inhibitors
Rationale: PPIs provide superior and prolonged acid suppression compared to H2RAs and are
significantly more effective for healing erosive esophagitis and preventing relapse.
Question 4: Which laxative works by osmotically drawing water into the colon and is preferred
for chronic constipation?
A) Docusate sodium
B) Polyethylene glycol
C) Bisacodyl
D) Mineral oil
Correct Answer: B) Polyethylene glycol
Rationale: Polyethylene glycol (PEG) is an osmotic laxative that is safe for long-term use, well-
tolerated, and preferred for chronic constipation. Docusate is a stool softener, bisacodyl is a
stimulant, and mineral oil is a lubricant.
Question 5: Which medication is FDA-approved for diarrhea-predominant irritable bowel
syndrome (IBS-D) and acts as a mixed opioid receptor agonist/antagonist?
A) Loperamide
B) Diphenoxylate/atropine
C) Eluxadoline
D) Alosetron
Correct Answer: C) Eluxadoline
Rationale: Eluxadoline is approved for IBS-D. It acts on peripheral opioid receptors to decrease
GI motility and secretion without significant central nervous system effects. Alosetron is a 5-HT3
antagonist reserved for severe IBS-D in women.
Topic 2: Pharmacokinetics & Pharmacodynamics
Question 6: A patient with cirrhosis experiences increased effects from a drug primarily
metabolized by the liver. Which pharmacokinetic phase is most likely impaired?
A) Absorption
, B) Distribution
C) Metabolism
D) Excretion
Correct Answer: C) Metabolism
Rationale: Cirrhosis impairs hepatic function, reducing both Phase I (oxidation, reduction,
hydrolysis) and Phase II (conjugation) metabolism, leading to drug accumulation and potential
toxicity.
Question 7: Which of the following drugs follows zero-order elimination kinetics?
A) Penicillin
B) Ethanol
C) Aspirin
D) Acetaminophen
Correct Answer: B) Ethanol
Rationale: Zero-order elimination means a constant amount of drug is eliminated per unit of
time, regardless of the drug concentration. Ethanol, phenytoin, and high-dose aspirin are classic
examples.
Question 8: A patient taking warfarin is prescribed sulfamethoxazole. What is the primary
mechanism for the expected drug interaction?
A) Increased renal excretion of warfarin
B) Displacement of warfarin from plasma protein binding sites
C) Induction of CYP2C9 enzymes
D) Decreased absorption of warfarin
Correct Answer: B) Displacement of warfarin from plasma protein binding sites
Rationale: Both warfarin and sulfamethoxazole are highly protein-bound. Sulfamethoxazole
displaces warfarin, increasing the free (active) fraction of warfarin and increasing the risk of
bleeding.
Question 9: Which term describes the ratio of a drug's toxic dose to its therapeutic dose?
A) Therapeutic index
(2026) – Actual Questions, Verified
Answers with Study Guide | Guarantee
Pass
,Topic 1: Gastrointestinal Pharmacology
Question 1: A patient is diagnosed with helicobacter pylori infection. Which regimen represents
the standard clarithromycin triple therapy?
A) Clarithromycin 500mg BID + amoxicillin 1g BID + PPI BID
B) Clarithromycin 500mg BID + metronidazole 500mg TID + PPI BID
C) Amoxicillin 1g BID + clarithromycin 500mg BID + metronidazole 500mg BID + PPI BID
D) Both A and B are acceptable clarithromycin triple therapy regimens
Correct Answer: D) Both A and B are acceptable clarithromycin triple therapy regimens
Rationale: Clarithromycin triple therapy consists of clarithromycin 500mg BID plus a PPI BID,
with EITHER amoxicillin 1g BID OR metronidazole 500mg TID as the third agent. Option A
represents the amoxicillin-based regimen; Option B represents the metronidazole-based
regimen (used in penicillin-allergic patients or areas with high macrolide resistance). Option C
describes a non-bismuth-based quadruple therapy, not triple therapy.
Question 2: A patient with a documented penicillin allergy requires eradication therapy for H.
pylori. Which of the following regimens is most appropriate?
A) Bismuth quadruple therapy
B) Clarithromycin triple therapy with amoxicillin
C) Levofloxacin triple therapy
D) PPI monotherapy
Correct Answer: A) Bismuth quadruple therapy
Rationale: In patients with penicillin allergy, amoxicillin must be avoided. Bismuth quadruple
therapy (PPI + bismuth + metronidazole + tetracycline) is a recommended first-line or alternative
regimen for H. pylori eradication in this population.
Question 3: Which class of medications is considered the most effective for healing erosive
esophagitis in gastroesophageal reflux disease (GERD)?
A) H2 receptor antagonists
B) Proton pump inhibitors
C) Antacids
,D) Prokinetics
Correct Answer: B) Proton pump inhibitors
Rationale: PPIs provide superior and prolonged acid suppression compared to H2RAs and are
significantly more effective for healing erosive esophagitis and preventing relapse.
Question 4: Which laxative works by osmotically drawing water into the colon and is preferred
for chronic constipation?
A) Docusate sodium
B) Polyethylene glycol
C) Bisacodyl
D) Mineral oil
Correct Answer: B) Polyethylene glycol
Rationale: Polyethylene glycol (PEG) is an osmotic laxative that is safe for long-term use, well-
tolerated, and preferred for chronic constipation. Docusate is a stool softener, bisacodyl is a
stimulant, and mineral oil is a lubricant.
Question 5: Which medication is FDA-approved for diarrhea-predominant irritable bowel
syndrome (IBS-D) and acts as a mixed opioid receptor agonist/antagonist?
A) Loperamide
B) Diphenoxylate/atropine
C) Eluxadoline
D) Alosetron
Correct Answer: C) Eluxadoline
Rationale: Eluxadoline is approved for IBS-D. It acts on peripheral opioid receptors to decrease
GI motility and secretion without significant central nervous system effects. Alosetron is a 5-HT3
antagonist reserved for severe IBS-D in women.
Topic 2: Pharmacokinetics & Pharmacodynamics
Question 6: A patient with cirrhosis experiences increased effects from a drug primarily
metabolized by the liver. Which pharmacokinetic phase is most likely impaired?
A) Absorption
, B) Distribution
C) Metabolism
D) Excretion
Correct Answer: C) Metabolism
Rationale: Cirrhosis impairs hepatic function, reducing both Phase I (oxidation, reduction,
hydrolysis) and Phase II (conjugation) metabolism, leading to drug accumulation and potential
toxicity.
Question 7: Which of the following drugs follows zero-order elimination kinetics?
A) Penicillin
B) Ethanol
C) Aspirin
D) Acetaminophen
Correct Answer: B) Ethanol
Rationale: Zero-order elimination means a constant amount of drug is eliminated per unit of
time, regardless of the drug concentration. Ethanol, phenytoin, and high-dose aspirin are classic
examples.
Question 8: A patient taking warfarin is prescribed sulfamethoxazole. What is the primary
mechanism for the expected drug interaction?
A) Increased renal excretion of warfarin
B) Displacement of warfarin from plasma protein binding sites
C) Induction of CYP2C9 enzymes
D) Decreased absorption of warfarin
Correct Answer: B) Displacement of warfarin from plasma protein binding sites
Rationale: Both warfarin and sulfamethoxazole are highly protein-bound. Sulfamethoxazole
displaces warfarin, increasing the free (active) fraction of warfarin and increasing the risk of
bleeding.
Question 9: Which term describes the ratio of a drug's toxic dose to its therapeutic dose?
A) Therapeutic index
