Which of the following is NOT an example of histamine H2 receptor antagonist?

Appeared in: UPRVUNL - 2021

Explanation

Omeprazole is a Proton Pump Inhibitor (PPI), a different class of acid-reducing medication.
Its mechanism involves irreversibly blocking the H+/K+ ATPase enzyme (the proton pump) in gastric parietal cells.
This action inhibits the final step of acid production, making PPIs more potent suppressors of gastric acid than H2 antagonists.
A common mnemonic for this class is that the generic names typically end in the suffix '-prazole'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of drugs for acid-peptic disorders (H2 antagonists vs. PPIs) as background academic context rather than a clinical decision trigger.
Nurses must understand the difference between H2 blockers and PPIs for correct administration and patient teaching. PPIs like omeprazole are most effective when taken 30-60 minutes before the first meal of the day.
H2 blockers like famotidine are often given at bedtime to suppress nocturnal acid production, but can also be used for on-demand relief of heartburn.
Cimetidine has a high potential for drug interactions by inhibiting the P-450 enzyme system, affecting drugs like warfarin and phenytoin. Nurses should always review a patient's medication list for potential interactions.

How to Approach the Question

This is a negatively framed question using the word 'NOT', which requires you to identify the outlier among the options.
First, identify the drug class mentioned in the stem: 'histamine H2 receptor antagonist'.
Next, review each option and classify it. A useful strategy is to recognize the common suffixes for these drug classes.
H2 receptor antagonists often have generic names ending in '-tidine' (e.g., Ranitidine, Famotidine, Cimetidine).
Proton Pump Inhibitors (PPIs) often have generic names ending in '-prazole' (e.g., Omeprazole).
The option that does not fit the '-tidine' pattern and belongs to a different class (PPIs) is the correct answer.

Concept Tested & Keywords

Concept Tested: Classification of drugs for acid-peptic disorders (H2 antagonists vs. PPIs)
Stem keywords: histamine H2 receptor antagonist, NOT, example
Lead-in keywords: NOT
Negative lead-in flag: Question asks for the option that does not belong to the specified drug class.

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E6 Pharmacology Nursing Lilley 11e Part 3 p. 167-169

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