Which medication classification is most often associated with the side effects of gynecomastia, amenorrhea, and galactorrhea?
Anticholinergic medications.
First-generation (conventional) antipsychotics.
Second-generation (atypical) antipsychotics.
Third-generation antipsychotics.
The Correct Answer is B
Choice A rationale
Anticholinergic medications primarily block acetylcholine receptors, commonly leading to side effects like dry mouth, blurred vision, constipation, and urinary retention. They do not typically cause hyperprolactinemia-related effects such as gynecomastia (male breast enlargement), amenorrhea (absence of menstruation), or galactorrhea (milky discharge).
Choice B rationale
First-generation (conventional) antipsychotics, like haloperidol, exert a potent Dopamine-2 receptor antagonism in the tuberoinfundibular pathway. This blockade lifts the dopaminergic inhibition on prolactin release from the anterior pituitary, resulting in hyperprolactinemia, which is the direct cause of gynecomastia, amenorrhea, and galactorrhea.
Choice C rationale
Second-generation (atypical) antipsychotics also block D2 receptors but often have a broader receptor profile. While some (like risperidone) can cause hyperprolactinemia, others are prolactin-sparing or cause it less frequently or severely than the first-generation agents.
Choice D rationale
Third-generation antipsychotics, such as aripiprazole, are often dopamine system stabilizers (partial agonists). They are less likely to cause significant D2 blockade and often have a lower risk of inducing hyperprolactinemia and the associated endocrine side effects compared to both first- and some second-generation agents.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Dismissing the friend and relying solely on a primary care provider (PCP) is inefficient and potentially dangerous in an emergency setting. The PCP may not be immediately available, and the friend often possesses critical, time-sensitive information regarding the client's baseline mental status, recent behavior, or potential ingestion of substances which is invaluable for immediate triage and stabilization in the emergency room.
Choice B rationale
Accepting the friend's information is the appropriate action, as this is consistent with the standard of care in an emergency where the client is incapacitated and unable to provide a coherent history. The principle of beneficence mandates gathering all available relevant data to protect the client's well-being. Confidentiality laws permit disclosure for treatment when the patient is unable to communicate due to a medical emergency.
Choice C rationale
Refusing information due to confidentiality concerns is an incorrect application of HIPAA (Health Insurance Portability and Accountability Act). When a client's medical condition prevents them from making decisions or the situation is an emergency, the law allows the sharing of information with family or close associates involved in their care to facilitate prompt and effective treatment, prioritizing the client's immediate health.
Choice D rationale
Requiring a signed release from a client who is currently unable to provide a coherent history and demonstrate decision-making capacity is an ethical and practical impossibility. Informed consent, including releases, necessitates cognitive ability. Delaying the acquisition of critical history while waiting for the client to become coherent could lead to detrimental delays in diagnosis and potentially life-saving emergency medical interventions
Correct Answer is C
Explanation
Choice A rationale
A skull radiograph (X-ray) is a two-dimensional imaging technique that primarily visualizes bone structure and density, which is useful for identifying fractures, calcification, or foreign objects. It provides no information on the metabolic activity or blood flow of brain tissue, which are the biological substrates of brain function.
Choice B rationale
Magnetic resonance imaging (MRI) uses strong magnetic fields and radio waves to generate detailed anatomical images of soft tissues, including the brain. It provides excellent structural resolution (detecting tumors or lesions) but, in its standard form, offers limited direct, quantitative data on real-time cellular energy consumption or neurotransmitter activity, which characterize function.
Choice C rationale
Positron Emission Tomography (PET) scan is a nuclear medicine technique that uses a small amount of a radioactive tracer, such as fluorodeoxyglucose (FDG), to measure metabolic processes like glucose metabolism and regional cerebral blood flow. Since glucose is the brain's primary energy source, areas of higher uptake indicate greater neuronal activity, thus providing crucial functional information.
Choice D rationale
A Computed Tomography (CT) scan uses X-rays from multiple angles to create cross-sectional images of the body. It provides detailed structural information (e.g., hemorrhage, edema, atrophy) but, similar to MRI, does not offer direct, specific quantification of ongoing, real-time metabolic rate or neurotransmitter release, which are hallmarks of brain function.
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