A client is newly prescribed a medication that will block the effects of histamine for the treatment of a mental health disorder. The client asks, “What side effects should I anticipate with this new medication?” Which response by the nurse is accurate?
“You should expect weight loss.”
“You should expect to feel drowsy.”
“You should expect to experience insomnia.”
“You should expect your blood pressure to increase.”
The Correct Answer is B
Choice A reason: Histamine blockade, as in antipsychotics like olanzapine, promotes sedation, not weight loss. Weight gain is common due to histamine’s role in appetite regulation via hypothalamic signaling. Weight loss is not a typical side effect, making this response inaccurate for histamine-blocking medications.
Choice B reason: Histamine receptor blockade, common in medications like quetiapine, reduces wakefulness by inhibiting histamine’s alerting effects in the cortex. This causes drowsiness, a frequent side effect in psychiatric treatments, aligning with the pharmacological mechanism and making this the correct response.
Choice C reason: Insomnia is not typical with histamine blockade, which promotes sedation. Histamine enhances alertness; blocking it, as in antihistaminic antipsychotics, induces sleepiness, not wakefulness. This response contradicts the neuropharmacological effect, making it incorrect for expected side effects.
Choice D reason: Blood pressure increase is unrelated to histamine blockade. Histamine affects wakefulness and appetite, not vascular tone directly. Antihistaminic drugs may cause orthostatic hypotension via other receptors, not hypertension, making this response inaccurate for histamine-blocking medication effects.
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 A
Explanation
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.
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