In treating a patient with Addison's disease, which lab level should the nurse closely monitor?

In the management of Addison's disease, monitoring sodium levels is critical due to the nature of the disease, which involves an adrenal insufficiency leading to inadequate production of cortical hormones, particularly aldosterone. Aldosterone plays a key role in regulating sodium retention in the kidneys. In Addison's disease, the deficiency of aldosterone results in hyponatremia, or low sodium levels, which can lead to symptoms such as weakness, fatigue, and even severe complications like shock if left unchecked.

Regularly monitoring sodium levels helps healthcare providers assess the effectiveness of treatment, such as hormone replacement therapy, and make necessary adjustments to medication or fluid replacement strategies. Maintaining appropriate sodium levels is crucial for overall homeostasis and helps prevent potential life-threatening complications associated with electrolyte imbalances in patients with this condition.