Antimotility drugs like Loperamide are contraindicated in which of the following conditions?

RML PRE 2025

Pharmacology

Medium

Appeared in: RML PRE 2025

Explanation

Loperamide is an antimotility agent that slows intestinal peristalsis, which is the wave-like muscle contractions that move food through the digestive tract.
Acute bloody diarrhea accompanied by a high fever is characteristic of dysentery, an inflammatory disorder of the intestine caused by invasive bacterial pathogens (e.g., Shigella, Salmonella, Campylobacter).
In cases of dysentery, diarrhea is a protective mechanism that helps the body expel the invading microorganisms and their toxins.
Slowing down gut motility with Loperamide can trap these harmful pathogens, allowing them to multiply and potentially leading to a more severe infection or life-threatening complications like toxic megacolon.

Option A: This is a primary indication for Loperamide. In mild, non-febrile diarrhea, the cause is typically non-invasive, and symptomatic relief is the main goal.
Option C: Loperamide is commonly used as a part of the management strategy for diarrhea-predominant Irritable Bowel Syndrome (IBS-D) to control stool frequency and improve consistency.
Option D: This is the general category for which antimotility drugs are designed. When diarrhea is not caused by an infection, slowing the gut is safe and effective for symptom relief.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Contraindications of antimotility drugs as background academic context rather than a clinical decision trigger.
A crucial nursing responsibility is to assess a patient with diarrhea for 'red flag' signs before administering an antimotility agent. These signs include high fever, visible blood in the stool, and severe abdominal pain.
Administering Loperamide to a patient with febrile dysentery is a significant patient safety issue that can lead to worsening of the condition and serious complications.
Patient education is key. Nurses should instruct patients using over-the-counter Loperamide to stop taking it and seek medical attention if they develop a fever or see blood in their stool.

How to Approach the Question

First, identify the core concept of the question: the contraindications for antimotility drugs like Loperamide.
Recall the mechanism of action for Loperamide: it slows down intestinal movement (peristalsis).
Think critically about when slowing down the gut would be harmful rather than helpful. The body uses diarrhea as a defense mechanism to expel harmful substances.
Evaluate each option. Options A, C, and D describe scenarios (mild traveler's diarrhea, IBS, non-infective stools) where the primary goal is to stop the diarrhea for symptomatic relief.
Analyze Option B: 'Acute bloody diarrhea with high fever'. These symptoms are classic signs of an invasive bacterial infection (dysentery).
Conclude that in the case of an invasive infection, slowing the gut would trap the pathogens, making the condition worse. Therefore, this is the correct contraindication.

Concept Tested & Keywords

Q4W4ROYLyLt2ys4clNWyFa

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1635-1637

E6 Pharmacology Nursing Lilley 11e Part 3 p. 176-178

E6 Medicine Harrison 22e Part 1 p. 348-350