A student asks the pharmacology instructor to explain the action of anticholinergic agents.
What would be the instructor's best response?
They compete with serotonin for muscarinic acetylcholine receptor sites.
They increase norepinephrine at the neuromuscular junction.
They block nicotinic receptors.
They act to block the effects of the parasympathetic nervous system.
The Correct Answer is D
Choice A rationale
Serotonin does not compete with anticholinergic agents at muscarinic acetylcholine receptor sites; anticholinergics target these receptors to inhibit the parasympathetic nervous system.
Choice B rationale
Anticholinergics do not increase norepinephrine at the neuromuscular junction.
Choice C rationale
Nicotinic receptors are primarily affected by different classes of drugs, such as neuromuscular blockers.
Choice D rationale
Anticholinergics inhibit the actions of the parasympathetic nervous system by blocking muscarinic receptors, reducing bodily functions like saliva production, digestion, and urination.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
This choice is correct. The side effects of paroxetine, including headaches, nervousness, and poor appetite, are common during the initial weeks of treatment and often decrease over time as the patient’s body adjusts to the medication. Reassuring the patient helps them continue the treatment without undue anxiety about these side effects, which are typically transient and manageable.
Choice B rationale
This choice is incorrect. Abruptly stopping paroxetine without consulting a healthcare provider is not recommended because it can lead to withdrawal symptoms and a possible relapse of depression or anxiety. The patient should only discontinue the medication under the guidance of a healthcare provider, who may suggest a gradual tapering off process to minimize withdrawal symptoms.
Choice C rationale
This choice is partially correct. Taking paroxetine with food can help mitigate some gastrointestinal side effects, such as nausea. However, it does not directly address headaches, nervousness, or poor appetite. Although taking the medication with food is a useful tip, it is not the most comprehensive advice for this particular situation.
Choice D rationale
This choice is incorrect. While adjusting the dose may be an option, it is premature to suggest this after only two weeks of treatment. The patient’s body may still be adjusting to the medication, and many side effects diminish with time. The decision to change the dosage should be made by the healthcare provider based on a thorough evaluation of the patient’s response to the treatment.
Correct Answer is A
Explanation
Choice A rationale
True, because antitussive agents, which are cough suppressants, can potentially lead to dependence due to their central nervous system effects. This risk is particularly concerning for patients with a history of addiction.
Choice B rationale
False, is incorrect because the potential for addiction does warrant caution when prescribing antitussive agents to patients with a history of addiction. .
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