A nurse is educating a client starting on risperidone. Which of the following statements best explains the unique pharmacological action of second-generation antipsychotics compared to first-generation antipsychotics?
They enhance dopamine transmission to improve cognitive function in schizophrenia.
They block dopamine and serotonin receptors, reducing extrapyramidal side effects.
They primarily block dopamine D2 receptors, leading to high rates of extrapyramidal symptoms.
They selectively block only serotonin receptors, improving mood without affecting dopamine.
The Correct Answer is B
Choice A reason: Enhancing dopamine transmission is not the mechanism of antipsychotics; excessive dopamine is implicated in schizophrenia’s positive symptoms, so reducing—not enhancing—dopamine activity is key.
Choice B reason: Blocking both dopamine and serotonin receptors is characteristic of second-generation (atypical) antipsychotics. This dual action reduces extrapyramidal side effects while still targeting positive and negative symptoms.
Choice C reason: First-generation antipsychotics primarily block dopamine D2 receptors, which increases the risk for extrapyramidal side effects such as dystonia and parkinsonism.
Choice D reason: Selective serotonin receptor blockade is not the defining mechanism of second-generation antipsychotics. These medications act on both dopamine and serotonin systems.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: When anxiety is severe, the client cannot focus or process complex discussions. Asking them to explore worries may overwhelm them further.
Choice B reason: Providing extensive information is inappropriate in crisis moments because the client’s concentration and comprehension are impaired.
Choice C reason: Clear, calm, and brief communication helps reduce overstimulation, provides structure, and reassures the client during high anxiety. This is the most therapeutic choice.
Choice D reason: Rapid statements can escalate the client’s sense of being overwhelmed, increasing anxiety rather than calming it.
Correct Answer is A
Explanation
Choice A reason: Nurses have a duty to protect potential victims from harm. Breaking confidentiality is justified to warn the intended victim and involve the healthcare team, consistent with the Tarasoff duty to warn principle.
Choice B reason: Warning the victim without involving the treatment team ignores the collaborative care process and may compromise safety planning.
Choice C reason: Waiting to act places the potential victim at risk and disregards the ethical duty to prevent harm.
Choice D reason: Maintaining confidentiality in this situation endangers others and violates the ethical principle of nonmaleficence.
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