A client with Addison's disease started taking hydrocortisone in a divided daily dose last week. It is most important for the nurse to monitor which serum laboratory value?

Choice A reason: Albumin levels are not directly affected by hydrocortisone therapy and are not a priority in monitoring Addison’s disease management. Choice B reason: Glucocorticoids like hydrocortisone can increase serum glucose levels due to their effect on carbohydrate metabolism. Monitoring glucose is essential to detect hyperglycemia, especially in newly initiated therapy. Choice C reason: Osmolarity may be indirectly influenced by adrenal hormones, but it is not the most specific or sensitive marker for hydrocortisone effects. Choice D reason: Platelet levels are not typically impacted by hydrocortisone in the context of Addison’s disease and are not a priority for routine monitoring.