Your patient complains of dry mouth with swallowing difficulty. Which among the following drugs can produce these side effects when administered in the above condition?

Appeared in: Chitranjjan National Cancer Institute Kolkata - 2021

Explanation

Dicyclomine is an antispasmodic and anticholinergic agent used primarily to treat irritable bowel syndrome (IBS).
It works by blocking muscarinic receptors for acetylcholine in smooth muscle and secretory glands.
This blockade leads to decreased salivary gland secretion, causing the symptom of dry mouth (xerostomia).
It also reduces motility in the gastrointestinal tract, which can contribute to a sensation of difficulty swallowing (dysphagia).

Why Other Options Were Wrong

Option B: This is an anthelmintic drug used to treat parasitic worm infections. Its common side effects are gastrointestinal (nausea, vomiting, diarrhea), not anticholinergic.
Option C: This is an antifungal medication. Its side effect profile includes headache, photosensitivity, and rash, but not the classic anticholinergic effects of dry mouth and dysphagia.
Option D: This is an opioid antagonist used to rapidly reverse an opioid overdose. Its action is to block opioid receptors, which can precipitate acute withdrawal symptoms, but it does not have anticholinergic properties.

Related Visual

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Pharmacology: Anticholinergic Adverse Effects in acute care settings.
Recognizing anticholinergic side effects is a key nursing responsibility for patient safety, especially in elderly patients who are at higher risk for confusion, falls, and urinary retention.
Nurses must educate patients on managing dry mouth with sugar-free lozenges, frequent sips of water, and good oral hygiene to prevent dental caries and discomfort.
What if? If the patient also had a diagnosis of narrow-angle glaucoma, Dicyclomine would be strictly contraindicated because anticholinergics can increase intraocular pressure and precipitate an acute glaucoma crisis.

How to Approach the Question

First, analyze the patient's symptoms presented in the stem: 'dry mouth' (xerostomia) and 'swallowing difficulty' (dysphagia).
Recognize that this combination of symptoms points towards a classic drug side effect profile.
Recall or deduce that these are hallmark anticholinergic/antimuscarinic effects.
Review the medication options provided and identify which one belongs to the anticholinergic class.
Dicyclomine is a well-known antispasmodic with strong anticholinergic activity.
Eliminate the other options by identifying their primary drug class and known side effects (Pyrantel - anthelmintic, Griseofulvin - antifungal, Naloxone - opioid antagonist), which do not match the patient's symptoms.

Concept Tested & Keywords

Concept Tested: Pharmacology: Anticholinergic Adverse Effects
Stem keywords: dry mouth, swallowing difficulty, side effects
Lead-in keywords: Which among the following
Clinical cues: patient complains of dry mouth with swallowing difficulty
Negative lead-in flag: false

Question ID

QDl3g5MAgBmGvtbcuFyETm

Reference Book

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) pp. 10794-10796, 10790-10792

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