Which statement is suitable for ranitidine (rantac), EXCEPT?

NORCET -4 , 2023

Pharmacology

Easy

Appeared in: NORCET -4 , 2023

Explanation

The statement 'Taken with antacid' represents incorrect patient advice, making it the unsuitable statement.
Antacids interfere with the gastrointestinal absorption of H2-receptor antagonists like ranitidine, which reduces the drug's effectiveness.
To ensure proper absorption and therapeutic effect, ranitidine should be administered at least 1 to 2 hours before or after taking an antacid.
Since the question asks to identify the exception (the unsuitable statement), this option is the correct answer.

Option A: This is a true statement. Diarrhea is a recognized and common side effect of ranitidine, so it is a 'suitable' statement in the context of describing the drug.
Option B: This is a true statement. Ranitidine can cross the blood-brain barrier and cause central nervous system side effects like confusion, particularly in vulnerable populations such as the elderly or those with renal impairment.
Option D: This is a true statement. Smoking increases gastric acid production, which counteracts the acid-reducing effect of ranitidine and can delay the healing of peptic ulcers.

Visual 1: Diagram: Illustration of a gastric parietal cell showing the H2-receptor and how ranitidine blocks it to reduce acid production, contrasted with the site of action for antacids (neutralizing existing acid in the stomach lumen).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacology of H2-receptor antagonists, specifically drug interactions and side effects of Ranitidine as background academic context rather than a clinical decision trigger.
Patient education is a critical nursing responsibility. Nurses must instruct patients on the correct timing of medications, such as spacing ranitidine and antacids, to prevent drug interactions and ensure treatment goals are met.
Monitoring for adverse effects is essential. For patients on ranitidine, especially the elderly, nurses should be vigilant for new-onset confusion or changes in mental status and report them promptly.
Lifestyle counseling is integral to care. Advising patients to cease smoking is crucial as it directly impacts the efficacy of acid-suppressing medications and overall gastrointestinal health.

How to Approach the Question

First, identify the keyword 'EXCEPT'. This indicates that you are looking for the one option that is false, incorrect, or unsuitable.
Next, analyze the drug in question: ranitidine (Rantac), which is an H2-receptor antagonist used to decrease stomach acid.
Evaluate each option based on your pharmacological knowledge of ranitidine.
Option A: Recall the side effects. Is diarrhea a known side effect? Yes.
Option B: Can it cause confusion? Yes, CNS effects are possible.
Option D: Does smoking affect it? Yes, smoking increases acid and counteracts the drug.

Concept Tested & Keywords

Concept Tested: Pharmacology of H2-receptor antagonists, specifically drug interactions and side effects of Ranitidine.
Stem keywords: ranitidine, rantac
Lead-in keywords: EXCEPT
Negative lead-in flag: The question asks for the statement that is NOT suitable for ranitidine.

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