Paracetamol is not given to those patients who are already suffering from?

RRB Staff Nurse Kolkata-2015

Pharmacology

Easy

Appeared in: RRB Staff Nurse Kolkata-2015

Explanation

Liver Disorder.
Paracetamol is primarily metabolized in the liver. In individuals with pre-existing liver disease, the liver's ability to process the drug is impaired.
A toxic metabolite of paracetamol, N-acetyl-p-benzoquinone imine (NAPQI), can accumulate if the liver cannot detoxify it effectively with glutathione.
This accumulation of NAPQI leads to severe hepatocellular damage and necrosis, a condition known as hepatotoxicity.
Therefore, patients with conditions like hepatitis or cirrhosis are at a significantly higher risk of liver failure when taking paracetamol.

Option B: Paracetamol is generally considered safe for patients with kidney disorders at therapeutic doses, especially when compared to NSAIDs which are known to be nephrotoxic. It is not a primary contraindication.
Option C: There is no established link that makes lung disorders a contraindication for paracetamol use. It is considered safe in this patient population.
Option D: Paracetamol is often the recommended analgesic for patients with G.I.T. disorders like peptic ulcers or gastritis because it does not inhibit prostaglandins in the stomach lining, unlike NSAIDs, and therefore does not cause gastric irritation or bleeding.

Visual 1: Flowchart - A diagram illustrating the metabolic pathways of paracetamol in the liver. It should clearly show the main safe conjugation pathway and the minor toxic pathway leading to NAPQI. It should also depict how glutathione detoxifies NAPQI and what happens during an overdose when glutathione is depleted.
Visual 2: Infographic - A comparison table showing the primary risks of Paracetamol vs. NSAIDs (e.g., Ibuprofen, Aspirin), highlighting Liver toxicity for Paracetamol and G.I./Kidney toxicity for NSAIDs.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Drug Contraindications and Metabolism as background academic context rather than a clinical decision trigger.
A crucial nursing responsibility is to assess a patient's history for liver disease and chronic alcohol use before administering paracetamol.
Patient education is vital. Nurses must teach patients about the maximum daily dose of paracetamol (4g for healthy adults) and the dangers of exceeding it. Patients should also be taught to check the labels of over-the-counter cold and flu medications, as they often contain paracetamol, to avoid accidental overdose.
The maximum recommended daily dose is lower for patients with liver issues or chronic alcohol use, typically 2 grams per day. Always follow prescriber orders.

How to Approach the Question

First, identify the core subject of the question, which is the pharmacology of paracetamol.
The question asks for a condition where paracetamol is 'not given,' which points to a contraindication or a major adverse effect.
Recall or look up the primary organ responsible for metabolizing paracetamol. The liver is the key organ.
Evaluate each option based on this knowledge. Liver disorder directly relates to the organ of metabolism and potential toxicity.
Consider the known side-effect profiles of paracetamol versus other common analgesics like NSAIDs. Paracetamol is known for liver toxicity, while NSAIDs are known for G.I.T. and kidney issues.
Select the option that represents the most significant and well-established risk associated with the drug's metabolism, which is Liver Disorder.

Concept Tested & Keywords

Concept Tested: Drug Contraindications and Metabolism
Stem keywords: Paracetamol, not given, suffering from
Lead-in keywords: not given
Negative lead-in flag: The question asks what condition is a contraindication for paracetamol.

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