One of the side effects of antibiotics which may cause malabsorption syndrome is?

NHM UP Staff Nurse - 2019

Pharmacology

Medium

Appeared in: NHM UP Staff Nurse - 2019

Explanation

The primary mechanism by which antibiotics cause malabsorption is by disrupting the normal intestinal flora (gut microbiome).
Broad-spectrum antibiotics kill beneficial bacteria that are crucial for digestive processes.
These beneficial bacteria are responsible for synthesizing essential vitamins (like Vitamin K) and metabolizing bile acids needed for fat absorption.
The loss of this flora impairs the body's ability to absorb nutrients, particularly fats and fat-soluble vitamins, leading to malabsorption syndrome.
This disruption can also lead to superinfections, such as Clostridioides difficile, which causes severe diarrhea and further complicates nutrient absorption.

Option A: Altering normal food intake is an indirect consequence, not the direct mechanism of malabsorption. A patient might feel nauseous and eat less, but this affects nutrient intake, not the intestine's ability to absorb nutrients.
Option C: This option is vague and essentially a less specific version of 'Altering normal food intake'. It does not describe a physiological mechanism for malabsorption.
Option D: While some specific antibiotics (like neomycin) can cause direct damage to the intestinal structure (villi), this is a much less common mechanism of malabsorption compared to the disruption of gut flora.

Clinical Relevance

Nursing practice connection: Knowing Side effects of antibiotics leading to malabsorption syndrome helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses must educate patients on the importance of completing their antibiotic course while also monitoring for adverse effects like diarrhea.
Probiotics or foods rich in probiotics (like yogurt) may be recommended to help restore normal gut flora, although the timing and use should be discussed with a healthcare provider.
It is crucial to differentiate between common antibiotic-associated diarrhea and a more severe superinfection like C. difficile. Persistent, watery diarrhea, fever, and abdominal pain warrant immediate medical evaluation.

How to Approach the Question

First, identify the key concepts in the question: 'antibiotics', 'side effects', and 'malabsorption syndrome'.
Recall the primary functions of the gastrointestinal system and how antibiotics work.
Think about the most common and widely known side effect of antibiotics related to the gut. This is the disruption of the 'good bacteria' or normal flora.
Evaluate each option based on this primary mechanism.
Option B directly states 'Altering the normal flora of the intestine', which is the most direct and common cause.
Options A and C relate to intake, not absorption, making them incorrect. Option D describes a less common mechanism, making B the best and most frequent cause.

Concept Tested & Keywords

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E6 Pharmacology Nursing Lilley 11e Part 2 p. 293-295

E6 Nursing Fundamentals Taylor p. 616-618