A nurse is caring for a client who has an indwelling catheter with a urinary drainage system. Which of the following actions should the nurse take?

Rationale for correct choices:

• Serotonin syndrome: The client presents with restlessness, abdominal pain, disorientation, and fever shortly after an increase in paroxetine, a selective serotonin reuptake inhibitor (SSRI). These symptoms are consistent with serotonin toxicity, which can develop when serotonergic medications are started or doses increased. Early recognition is critical because serotonin syndrome can progress rapidly and become life-threatening without prompt intervention.

• Adverse effects of paroxetine: The recent increase in paroxetine dosage to 30 mg daily places the client at risk for serotonergic adverse effects. Symptoms such as restlessness, gastrointestinal upset, and mental status changes reflect this risk. Identifying medication-related adverse effects allows the nurse to alert the provider for evaluation and potential dose adjustment or discontinuation.

Rationale for incorrect choices:

• Agoraphobia: The client does not exhibit fear of public spaces or avoidance behaviors typical of agoraphobia. Current symptoms are acute and physiological rather than anxiety-driven avoidance. Therefore, this condition does not explain the presenting findings.

• Bulimia: The client does not report binge eating, purging, or restrictive behaviors. Gastrointestinal symptoms are linked to medication effects rather than eating disorder behaviors. Bulimia is inconsistent with the acute presentation and current assessment.

• Mania: Manic symptoms include elevated mood, hyperactivity, decreased need for sleep, and impulsivity. The client reports hopelessness, disinterest, and lethargy rather than hyperactive or expansive mood changes. Mania is therefore unlikely. The presentation aligns more with serotonergic toxicity.

• Hypertensive crisis: Hypertensive crisis typically presents with severe headache, elevated blood pressure, visual changes, and possible neurological deficits. The client’s blood pressure is not noted as elevated, and symptoms focus on gastrointestinal and neurological changes. Medication risk for hypertensive crisis is more relevant with MAO inhibitors, not SSRIs.

• Abdominal pain: While the client reports abdominal discomfort, it is a symptom rather than a cause of risk. Abdominal pain is a manifestation of serotonin syndrome rather than an independent risk factor. It does not identify the underlying condition requiring immediate intervention.

• Recent fall: Although a recent fall is noted, it did not result in head trauma and is unlikely related to the acute presentation. The fall is not causative for serotonin syndrome. It may warrant monitoring but does not explain current physiological changes.

• Anxiety: The client has a history of generalized anxiety disorder, but current acute symptoms (fever, disorientation, restlessness) exceed baseline anxiety levels. Anxiety alone does not account for fever or neurologic changes. The acute presentation is medication-related rather than purely psychiatric.

• Feelings of hopelessness: Hopelessness is part of the client’s underlying depressive disorder, not the acute risk factor. While it may impact overall mental health, it does not directly cause serotonin syndrome. Monitoring mood is important but secondary to physiological assessment.

A. Reduced anxiety: While anxiety may improve with overall health stabilization, it is not a direct indicator of potassium replacement effectiveness. Potassium primarily affects neuromuscular and cardiac function rather than emotional state.

B. Normal sinus rhythm: Hypokalemia can cause cardiac arrhythmias. The presence of a normal sinus rhythm indicates that potassium levels have been corrected and the heart’s electrical activity is stabilized, reflecting a positive response to supplementation.

C. Decreased urinary output: Changes in urinary output are not a direct measure of potassium replacement effectiveness and may indicate other complications, such as renal impairment or fluid imbalance.

D. Decreased blood pressure: Blood pressure changes are not a direct outcome of potassium supplementation and could suggest unrelated cardiovascular issues. Normalization of cardiac rhythm is a more specific indicator of intervention success.