Gastrointestinal Pharmacology
Exam QUESTIONS AND
VERIFIED ACCURATE
SOLUTION (DETAILED &
ELABORATED) |GET IT 100%
ACCURATE!! 2026 TEST!!
1. Proton pump inhibitors (PPIs) exert their effect by:
A. Blocking H2 receptors on parietal cells
B. Inhibiting gastric motility
C. Irreversibly inhibiting H+/K+ ATPase
D. Neutralizing gastric acid
Answer: C
PPIs such as omeprazole irreversibly inhibit the proton pump
(H+/K+ ATPase), the final pathway of acid secretion.
2. Which drug is an H2 receptor antagonist?
A. Omeprazole
B. Famotidine
C. Sucralfate
D. Misoprostol
,Answer: B
Famotidine blocks histamine H2 receptors on gastric parietal
cells, reducing acid secretion.
3. Misoprostol is primarily used to:
A. Treat GERD
B. Prevent NSAID-induced ulcers
C. Increase gastric acid secretion
D. Treat diarrhea
Answer: B
Misoprostol is a prostaglandin E1 analog that protects gastric
mucosa and prevents NSAID-induced ulcers.
4. Sucralfate works by:
A. Neutralizing acid
B. Coating ulcer sites
C. Blocking proton pumps
D. Increasing gastric emptying
Answer: B
Sucralfate forms a protective barrier over ulcers, shielding
them from acid and pepsin.
5. Which drug is commonly used for Helicobacter pylori
eradication?
,A. Metronidazole
B. Loperamide
C. Ondansetron
D. Dicyclomine
Answer: A
Metronidazole is part of many H. pylori combination
regimens.
6. Loperamide acts by:
A. Increasing intestinal secretion
B. Activating opioid receptors in the gut
C. Blocking serotonin receptors
D. Inhibiting H+/K+ ATPase
Answer: B
Loperamide slows gut motility via peripheral opioid receptor
activation.
7. Ondansetron is a:
A. Dopamine antagonist
B. 5-HT3 antagonist
C. H2 blocker
D. Prokinetic agent
Answer: B
Ondansetron blocks serotonin (5-HT3) receptors to reduce
nausea and vomiting.
, 8. Which drug is a prokinetic agent?
A. Metoclopramide
B. Loperamide
C. Omeprazole
D. Aluminum hydroxide
Answer: A
Metoclopramide increases gastric motility and promotes
gastric emptying.
9. Antacids primarily work by:
A. Reducing acid production
B. Neutralizing existing gastric acid
C. Blocking histamine receptors
D. Coating ulcers
Answer: B
Antacids directly neutralize stomach acid.
10. A major adverse effect of PPIs is:
A. Hypertension
B. Increased fracture risk
C. Hypoglycemia
D. Bradycardia
Answer: B
Long-term PPI use is associated with decreased calcium
absorption and fracture risk.
Exam QUESTIONS AND
VERIFIED ACCURATE
SOLUTION (DETAILED &
ELABORATED) |GET IT 100%
ACCURATE!! 2026 TEST!!
1. Proton pump inhibitors (PPIs) exert their effect by:
A. Blocking H2 receptors on parietal cells
B. Inhibiting gastric motility
C. Irreversibly inhibiting H+/K+ ATPase
D. Neutralizing gastric acid
Answer: C
PPIs such as omeprazole irreversibly inhibit the proton pump
(H+/K+ ATPase), the final pathway of acid secretion.
2. Which drug is an H2 receptor antagonist?
A. Omeprazole
B. Famotidine
C. Sucralfate
D. Misoprostol
,Answer: B
Famotidine blocks histamine H2 receptors on gastric parietal
cells, reducing acid secretion.
3. Misoprostol is primarily used to:
A. Treat GERD
B. Prevent NSAID-induced ulcers
C. Increase gastric acid secretion
D. Treat diarrhea
Answer: B
Misoprostol is a prostaglandin E1 analog that protects gastric
mucosa and prevents NSAID-induced ulcers.
4. Sucralfate works by:
A. Neutralizing acid
B. Coating ulcer sites
C. Blocking proton pumps
D. Increasing gastric emptying
Answer: B
Sucralfate forms a protective barrier over ulcers, shielding
them from acid and pepsin.
5. Which drug is commonly used for Helicobacter pylori
eradication?
,A. Metronidazole
B. Loperamide
C. Ondansetron
D. Dicyclomine
Answer: A
Metronidazole is part of many H. pylori combination
regimens.
6. Loperamide acts by:
A. Increasing intestinal secretion
B. Activating opioid receptors in the gut
C. Blocking serotonin receptors
D. Inhibiting H+/K+ ATPase
Answer: B
Loperamide slows gut motility via peripheral opioid receptor
activation.
7. Ondansetron is a:
A. Dopamine antagonist
B. 5-HT3 antagonist
C. H2 blocker
D. Prokinetic agent
Answer: B
Ondansetron blocks serotonin (5-HT3) receptors to reduce
nausea and vomiting.
, 8. Which drug is a prokinetic agent?
A. Metoclopramide
B. Loperamide
C. Omeprazole
D. Aluminum hydroxide
Answer: A
Metoclopramide increases gastric motility and promotes
gastric emptying.
9. Antacids primarily work by:
A. Reducing acid production
B. Neutralizing existing gastric acid
C. Blocking histamine receptors
D. Coating ulcers
Answer: B
Antacids directly neutralize stomach acid.
10. A major adverse effect of PPIs is:
A. Hypertension
B. Increased fracture risk
C. Hypoglycemia
D. Bradycardia
Answer: B
Long-term PPI use is associated with decreased calcium
absorption and fracture risk.
