All of the following are non-steroidal anti-inflammatory drugs EXCEPT

ESIC Nursing Officer-7July 2024

Pharmacology

Easy

Appeared in: ESIC Nursing Officer-7July 2024

Explanation

Allopurinol is not an NSAID; it is a xanthine oxidase inhibitor.
Its mechanism of action is to decrease the production of uric acid in the body.
It is used for the long-term prevention (prophylaxis) of gout and is not intended for treating acute pain or inflammation like NSAIDs are.

Option A: Naproxen is a classic NSAID. It belongs to the propionic acid derivative class and works by inhibiting COX enzymes.
Option B: Indomethacin is a potent NSAID from the acetic acid derivative class. It is frequently used to treat the acute pain and inflammation of a gout attack.
Option D: Diclofenac sodium is a widely used NSAID of the phenylacetic acid derivative class, effective for pain and inflammation.

Visual 1: Flowchart - A diagram comparing the biochemical pathways affected by NSAIDs and Allopurinol. It would show NSAIDs blocking the COX enzyme to prevent prostaglandin formation, and Allopurinol blocking the xanthine oxidase enzyme to prevent uric acid formation from purines.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacological classification of drugs, specifically identifying Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) as background academic context rather than a clinical decision trigger.
Differentiating drug classes is a fundamental nursing responsibility for patient safety. Administering an NSAID to a patient with a contraindication (e.g., active peptic ulcer, severe kidney disease) can cause significant harm.
Allopurinol carries a risk of severe hypersensitivity reactions, including Stevens-Johnson syndrome (SJS). A nurse must educate the patient to report any new rash immediately.
What if the patient presented with an acute, painful, swollen big toe (an acute gout attack)? The correct immediate treatment would be an NSAID (like Indomethacin) or colchicine, not Allopurinol. Starting Allopurinol during an acute flare can worsen symptoms.

How to Approach the Question

First, recognize that this is an 'EXCEPT' question. Your goal is to find the option that does not belong to the group specified (NSAIDs).
Second, define the primary characteristic of the group. NSAIDs work by inhibiting COX enzymes to reduce inflammation and pain.
Third, systematically evaluate each option against this definition.
Recall or deduce the drug class for each option: Naproxen (NSAID), Indomethacin (NSAID), and Diclofenac (NSAID) are all common anti-inflammatory pain relievers.
Identify Allopurinol's primary use, which is for gout. Recall that it works differently by lowering uric acid levels, not by inhibiting COX enzymes.
Conclude that Allopurinol is the outlier and therefore the correct answer.

Concept Tested & Keywords

Concept Tested: Pharmacological classification of drugs, specifically identifying Non-Steroidal Anti-Inflammatory Drugs (NSAIDs).
Stem keywords: non-steroidal anti-inflammatory drugs, NSAIDs
Lead-in keywords: EXCEPT
Negative lead-in flag: Question asks for the exception (the drug that is NOT in the specified class).

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