Which of the following is NOT a LMWH?

Appeared in: DSSSB 14 August 2024

Explanation

Warfarin is the correct answer as it is not an LMWH.
It is an oral anticoagulant classified as a vitamin K antagonist.
Its mechanism involves interfering with the synthesis of vitamin K-dependent clotting factors (II, VII, IX, and X).
Unlike LMWHs, which are injectable and act on Factor Xa, Warfarin is taken orally and requires close monitoring via INR.

Option A: Enoxaparin is a classic and widely used example of a Low Molecular Weight Heparin (LMWH).
Option B: Dalteparin is another common type of Low Molecular Weight Heparin (LMWH).
Option D: Reviparin is also a member of the Low Molecular Weight Heparin (LMWH) class of anticoagulants.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of anticoagulants, specifically differentiating Low Molecular Weight Heparins (LMWHs) from other types like Vitamin K antagonists as background academic context rather than a clinical decision trigger.
Understanding the different classes of anticoagulants is critical for safe nursing practice, including administration, monitoring, and patient education.
Nurses must educate patients on Warfarin about the importance of consistent dietary Vitamin K intake, regular INR checks, and signs of bleeding.
For patients on LMWH, nurses teach the proper technique for subcutaneous self-injection and monitoring for bleeding or injection site reactions.

How to Approach the Question

First, identify the core subject of the question, which is 'Low Molecular Weight Heparin (LMWH)'.
Note the negative keyword 'NOT'. This means you are looking for the option that does not belong to the LMWH category.
Evaluate each option against the definition of an LMWH.
Recall or deduce the classification of each drug: Enoxaparin (LMWH), Dalteparin (LMWH), and Reviparin (LMWH).
Identify Warfarin as belonging to a different class of anticoagulants (Vitamin K antagonist).
Therefore, Warfarin is the correct answer because it is NOT an LMWH.

Concept Tested & Keywords

Concept Tested: Classification of anticoagulants, specifically differentiating Low Molecular Weight Heparins (LMWHs) from other types like Vitamin K antagonists.
Stem keywords: LMWH, Low Molecular Weight Heparin, anticoagulant
Lead-in keywords: NOT
Negative lead-in flag: The question asks to identify the option that is NOT a Low Molecular Weight Heparin (LMWH).

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E6 Medicine Harrison 22e Part 1 p. 990-992

E6 Pharmacology Katzung 16e p. 958-960

E6 Medicine Harrison 22e Part 2 p. 67-69

Practise the full DSSSB 14 August 2024

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