Exhibits

A nurse is reviewing the medical record of a client who has COPD. The nurse should notify the provider about which of the following findings? (Click on the exhibit tabs for additional information about the client. There are three tabs that contain separate categories of data.)

Rationale:

A. “The client exhibits impulsive behavior.” Impulsivity is a hallmark trait of borderline personality disorder (BPD). Clients may engage in risky behaviors such as substance abuse, binge eating, or reckless driving, often in response to emotional instability and fear of abandonment.

B. “The client is overly concerned about minor details.” This behavior is more characteristic of obsessive-compulsive personality disorder, where clients show perfectionism and a rigid adherence to rules, order, and control over details.

C. “The client might act seductively.” Seductive or provocative behavior is commonly seen in histrionic personality disorder. These clients seek attention and approval through exaggerated emotional expression and flirtatiousness.

D. “The client is exceptionally clingy to others.” Clinginess and an excessive need to be taken care of are features of dependent personality disorder. These individuals have difficulty making decisions independently and fear separation or rejection.

Rationale for Correct Choices

• Serotonin syndrome: This potentially life-threatening condition results from an excess of serotonin, typically due to drug interactions involving serotonergic agents. Combining citalopram, a selective serotonin reuptake inhibitor (SSRI), with St. John's Wort, a natural serotonergic herb, significantly increases the risk. Symptoms can include agitation, increased heart rate, tremor, hyperreflexia, and elevated temperature.
• Interaction between citalopram and St. John's Wort: St. John's Wort induces serotonin activity and may inhibit serotonin reuptake similarly to SSRIs. When taken together, the serotonergic effects of both substances can accumulate, placing the client at risk for serotonin toxicity. The client’s increased heart rate and lack of symptom improvement despite therapy raise concern for early serotonin imbalance.

Rationale for Incorrect Choices

• Anticholinergic toxicity: Citalopram does not have significant anticholinergic effects, and neither does St. John's Wort. Symptoms like dry mouth, blurred vision, urinary retention, or confusion are not present here, and this diagnosis is unrelated to the medication interaction described.
• Hyperkalemia: Neither citalopram nor St. John's Wort typically causes potassium elevation. The client has no renal impairment or medication (e.g., ACE inhibitors or potassium-sparing diuretics) that would support this risk.
• Severe neutropenia: Citalopram and St. John’s Wort are not associated with bone marrow suppression or neutropenia. There is no evidence of infection, fever, or blood dyscrasia.
• Metabolic syndrome: Although the client's mother has diabetes (a risk factor), the client has a normal BMI (22.1), is experiencing weight loss, not gain, and has no evidence of hypertension, hyperlipidemia, or insulin resistance, all of which are required criteria for metabolic syndrome.
• Adverse effect of citalopram: While citalopram has side effects (e.g., GI upset, sexual dysfunction), the client’s most significant risk stems from adding St. John’s Wort, not the SSRI alone.
• An adverse effect of famotidine: Famotidine (an H2 blocker) can cause occasional CNS effects in older adults but does not interact dangerously with citalopram nor lead to serotonin syndrome.
• Family history of diabetes mellitus: This does increase long-term risk for type 2 diabetes but does not explain the acute medication-related concern, which is serotonin syndrome from the citalopram–St. John’s Wort combination.
• Interaction between citalopram and famotidine: There is no significant pharmacologic interaction between these two medications that would increase serotonin or cause the client's symptoms.