The nurse is evaluating data on a client who has Addison disease and prescribed hydrocortisone 15 mg daily for the last 2 years. Which client data is most important to report to the health care provider?

A client with Addison disease requires long-term corticosteroid replacement, and hydrocortisone is the standard therapy. A low-grade fever of 100.5°F is the most important finding to report because clients on long-term corticosteroids have impaired immune responses, meaning even a low-grade temperature may signal a serious underlying infection that the body cannot mount a full febrile response to. Corticosteroids mask typical signs of infection, so this finding could represent a significant illness requiring prompt evaluation. Mild weight gain over four months is an expected and commonly observed side effect of corticosteroid therapy due to fluid retention and increased appetite. A mild increase in fasting glucose is also an anticipated adverse effect of glucocorticoids on glucose metabolism and, while worth monitoring, is less immediately concerning than a possible infection. A blood pressure of 132/88 mmHg represents only mild elevation and, while corticosteroids can cause fluid retention and hypertension, this value does not constitute an urgent concern at this moment. The fever, in the context of immunosuppressive therapy, signals the greatest immediate risk to the client and demands prompt provider notification.