Case Presentation: Central Adrenal Insufficiency (CAI) is a rare and often late diagnosis due to nonspecific signs, such as fatigue, hyponatremia, electrolyte abnormalities and fever of unknown origin (FUO). CAI suspicion arises in patients with pituitary tumors, cranial irradiation, surgery, injury, infection, exogenous glucocorticoid withdrawal, and less commonly known, opioid use disorder. A 31-year-old male […]