Fludrocortisone is a synthetic corticosteroid with strong mineralocorticoid properties and moderate glucocorticoid activity. It is primarily used to replace or supplement aldosterone in conditions like Addison’s disease and certain forms of congenital adrenal hyperplasia, helping the body maintain sodium balance, blood pressure, and fluid homeostasis. Developed in the 1950s, fludrocortisone was among the first synthetic steroids designed to selectively mimic aldosterone’s effects while minimizing glucocorticoid side effects. Its introduction marked a significant advancement in endocrine therapy, providing a reliable treatment for patients with adrenal insufficiency and related disorders, and it remains a key medication in managing electrolyte and volume imbalances.