A 75-year-old patient with a history of hypertension and diabetes is admitted to the hospital with confusion and agitation. Which of the following interventions should the nurse prioritize to ensure the patient’s safety and address their immediate needs?

Choice A reason: One tablet (20 mg) underdoses the prescribed 40 mg. Fluoxetine, an SSRI, enhances serotonin for depression or anxiety. Scientifically, subtherapeutic dosing fails to stabilize neurotransmitter levels, risking persistent symptoms like low mood, as inadequate serotonin modulation doesn’t address neural imbalances, compromising treatment efficacy.

Choice B reason: Three tablets (60 mg) exceed the prescribed dose, risking toxicity. Fluoxetine overdosing can cause serotonin syndrome, with symptoms like agitation or tremors. Scientifically, excessive serotonin disrupts neural balance, leading to adverse effects, while precise dosing ensures safe and effective mood stabilization for mental health treatment.

Choice C reason: Four tablets (80 mg) significantly overdose the patient, increasing toxicity risks. Fluoxetine’s serotonin-enhancing effects can cause severe side effects, like seizures, if overdosed. Scientifically, maintaining therapeutic levels prevents neurological complications, ensuring safe treatment for depression or anxiety without disrupting neurotransmitter homeostasis.

Choice D reason: Two tablets (40 mg) match the prescribed dose, ensuring therapeutic serotonin levels. Scientifically, accurate Fluoxetine dosing optimizes neurotransmitter balance, effectively treating depression or anxiety by enhancing serotonin activity in the prefrontal cortex, reducing symptoms without risking toxicity or adverse neurological effects.

Choice A reason: Diet post-surgery may affect recovery but is unlikely to cause delirium. Scientifically, nutritional deficiencies contribute to long-term cognitive issues, not acute delirium, which involves acetylcholine deficits or neuroinflammation. Other factors, like medication, are more immediate triggers for post-surgical confusion and agitation.

Choice B reason: Family history of mental illness is irrelevant to acute delirium, which stems from physiological triggers. Scientifically, delirium involves temporary neurochemical imbalances, like acetylcholine or dopamine disruptions, not genetic predispositions. Focusing on history misses immediate causes, delaying effective intervention for post-surgical cognitive changes.

Choice C reason: Pain medications, like opioids, are common delirium causes post-surgery. Scientifically, they disrupt acetylcholine and dopamine pathways, causing confusion and agitation. Evaluating medication management identifies reversible triggers, stabilizing neural function and ensuring safety by addressing delirium’s neurobiological basis effectively in post-surgical care.

Choice D reason: Room temperature may affect comfort but rarely causes delirium. Scientifically, delirium stems from neurochemical imbalances, like acetylcholine deficits, not environmental factors. While comfort supports recovery, it’s secondary to medication or physiological triggers, which directly impact cognitive function post-surgery.