Pharmacology · single question
Which of the following is a PROTON PUMP INHIBITOR?
Show answer and explanation
Correct answer: A. Omeprazole
Omeprazole (A) is the classic proton pump inhibitor (PPI). PPIs irreversibly block the H⁺/K⁺-ATPase enzyme (proton pump) in gastric parietal cells, drastically reducing acid production. Used for GERD, peptic ulcers, and H. pylori eradication.
• Clonazepam (B) is a benzodiazepine — GABA-A receptor enhancer used for anxiety and seizures.
• Dexamethasone (C) is a corticosteroid — reduces inflammation via glucocorticoid receptors.
• Azithromycin (D) is a macrolide antibiotic — inhibits bacterial protein synthesis at the 50S ribosomal subunit.
Other PPIs to remember: Lansoprazole, Pantoprazole, Esomeprazole, Rabeprazole (all end in '-prazole').
• Clonazepam (B) is a benzodiazepine — GABA-A receptor enhancer used for anxiety and seizures.
• Dexamethasone (C) is a corticosteroid — reduces inflammation via glucocorticoid receptors.
• Azithromycin (D) is a macrolide antibiotic — inhibits bacterial protein synthesis at the 50S ribosomal subunit.
Other PPIs to remember: Lansoprazole, Pantoprazole, Esomeprazole, Rabeprazole (all end in '-prazole').