Which of the following listed drug is a proton pump inhibitor?

Appeared in: Daman & Diu Staff Nurse - 2018

Explanation

Pantoprazole belongs to the class of drugs known as Proton Pump Inhibitors (PPIs).
The primary mechanism of action for PPIs is the irreversible inhibition of the H+/K+ ATPase enzyme system (the proton pump) in gastric parietal cells.
This action blocks the final step of acid production, leading to a significant reduction in gastric acid secretion.
A common mnemonic for identifying this drug class is the suffix "-prazole," which is present in pantoprazole, omeprazole, and lansoprazole.

Option A: Sucralfate is not a PPI. It is a mucosal protective agent that forms a physical barrier over an ulcer site to protect it from acid and pepsin.
Option B: Famotidine is a Histamine-2 (H₂) receptor antagonist, not a PPI. It reduces acid secretion by blocking histamine receptors on parietal cells, a different mechanism than PPIs.
Option C: Ranitidine, like famotidine, is an H₂ receptor antagonist. It shares the same mechanism of action, which is distinct from that of PPIs.

Clinical Relevance

Nursing practice connection: Knowing Pharmacological classification of acid-controlling drugs helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding the different classes of acid-suppressing medications is crucial for safe nursing practice, especially regarding administration timing and potential drug interactions.
Nurses must educate patients on the importance of taking PPIs, like pantoprazole, 30-60 minutes before a meal for optimal effectiveness.
Patient monitoring for long-term PPI use is a key nursing responsibility, including assessing for signs of nutrient deficiencies (e.g., Vitamin B12, magnesium) and increased fracture risk.

How to Approach the Question

First, identify the key term in the question, which is "proton pump inhibitor."
This is a factual recall question that requires knowledge of drug classifications.
Recall the common suffix for PPIs, which is "-prazole."
Scan the options to find the drug that ends with this suffix. Pantoprazole fits this pattern.
Mentally classify the other options to confirm they are incorrect. Recognize that famotidine and ranitidine are H₂ blockers (often ending in "-tidine") and sucralfate is a unique mucosal protectant.

Concept Tested & Keywords

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E6 Pharmacology Nursing Lilley 11e Part 3 pp. 169-171, 168-170

E6 Pharmacology Katzung 16e p. 1732-1734

Practise the full Daman & Diu Staff Nurse - 2018

Attempt every question from this paper in a timed mock, then review the full solution for each one.