What nursing intervention is most appropriate for an 84-year-old client receiving hydrocortisone?

Monitoring blood glucose levels frequently is crucial for an 84-year-old client receiving hydrocortisone due to the pharmacological effects of glucocorticoids like hydrocortisone. These medications can induce hyperglycemia by increasing gluconeogenesis and leading to insulin resistance. Older adults are particularly at risk for developing diabetes or exacerbating existing diabetes conditions because of the hormonal changes and the potential for decreased insulin sensitivity with age.

Frequent monitoring of blood glucose helps identify any significant fluctuations early, allowing for timely interventions. It is essential for maintaining the client's overall health, particularly since the patient is already in a vulnerable age group where the impact of stress hormones can significantly affect metabolic control.

The other choices do not address the critical need for vigilant blood glucose management that is necessary when administering hydrocortisone, particularly in older adults who may have comorbid conditions.