A patient prescribed a muscarinic-receptor blocker will require assessment for what side effect?
Dry mouth
Orthostatic hypotension
Pseudoparkinsonism
Gynecomastia
The Correct Answer is A
Choice A reason: Muscarinic receptor blockers inhibit parasympathetic activity, reducing salivary gland secretion via acetylcholine pathways. This causes dry mouth, as muscarinic receptors in salivary glands are blocked, decreasing saliva production. This anticholinergic effect is common in drugs like benztropine, requiring assessment to manage discomfort and prevent oral health issues.
Choice B reason: Orthostatic hypotension is linked to alpha-1 adrenergic blockade, not muscarinic receptors. Muscarinic blockers affect cholinergic pathways, not vascular tone regulated by norepinephrine. While autonomic effects occur, hypotension is not a primary consequence, making this side effect unrelated to muscarinic receptor antagonism.
Choice C reason: Pseudoparkinsonism results from dopamine receptor blockade, common in antipsychotics, not muscarinic blockers. Muscarinic receptors regulate parasympathetic functions like salivation, not motor control. Blocking muscarinic receptors may alleviate parkinsonism by balancing cholinergic-dopaminergic activity, making this an incorrect side effect for assessment.
Choice D reason: Gynecomastia is associated with hormonal imbalances or dopamine blockade, not muscarinic receptors. Muscarinic blockers affect cholinergic systems, not prolactin or estrogen pathways. This side effect is unrelated to muscarinic antagonism, which primarily causes anticholinergic effects like dry mouth, not endocrine changes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: After diagnosis, setting goals and outcomes guides care, addressing issues like serotonin-driven depression. Goals, like “improve mood stability,” align with neurobiological needs, ensuring measurable, patient-centered targets. This step precedes interventions, forming the foundation for effective psychiatric treatment planning.
Choice B reason: Designing interventions follows goal-setting. Interventions, like therapy for dopamine imbalances, are based on established outcomes. Acting prematurely without goals risks misaligned care, as neurobiological targets must be defined first, making this step incorrect as the immediate next action.
Choice C reason: Implementation occurs after goals and interventions are set. Acting before defining outcomes, like stabilizing GABA for anxiety, risks ineffective care. The nursing process requires sequential planning to address neurobiological deficits, making implementation premature and incorrect at this stage.
Choice D reason: Spiritual assessment, while valuable, is part of initial data collection, not the next step after diagnosis. Goals addressing neurobiological issues, like serotonin deficits, take precedence to ensure targeted care. This option is irrelevant to the immediate planning phase of the nursing process.
Correct Answer is D
Explanation
Choice A reason: Buspirone is not used as needed; it requires weeks for serotonin modulation to reduce anxiety. Diazepam’s rapid GABA enhancement suits acute use. Buspirone’s chronic dosing schedule makes this characteristic incorrect for explaining its preference over diazepam for long-term anxiety management.
Choice B reason: Buspirone is slower-acting, taking weeks to enhance serotonin activity, unlike diazepam’s rapid GABA-mediated effects. For anxiety driven by amygdala hyperactivity, diazepam acts faster, making buspirone’s slower onset an incorrect reason for its prescription over diazepam in this context.
Choice C reason: Blood dyscrasias are not a known side effect of buspirone, which primarily affects serotonin receptors. This is unrelated to its preference over diazepam, which carries dependence risks. This characteristic is inaccurate and irrelevant to the rationale for choosing buspirone.
Choice D reason: Buspirone’s lack of dependence risk, unlike diazepam’s GABA-mediated addiction potential, makes it safer for long-term anxiety management. By enhancing serotonin in the prefrontal cortex, it reduces chronic anxiety without habit-forming effects, aligning with its preference for sustained treatment, making this the correct reason.
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