Chapter 33: Adrenal Drugs

The adrenal cortex produces glucocorticoids, primarily cortisol, and mineralocorticoids, primarily aldosterone, which are controlled by the hypothalamic-pituitary-adrenal axis and regulate stress response, metabolism, fluid and electrolyte balance, and blood pressure. Glucocorticoid medications including hydrocortisone, prednisone, methylprednisolone, dexamethasone, and betamethasone produce anti-inflammatory, immunosuppressive, and metabolic effects, making them essential treatments for asthma, chronic obstructive pulmonary disease, lupus, rheumatoid arthritis, inflammatory bowel disease, and organ transplant rejection. Mineralocorticoid therapy, represented primarily by fludrocortisone, addresses sodium and water retention disorders and is used in adrenal insufficiency syndromes. Anti-adrenal agents like osilodrostat inhibit cortisol production in hypercortisolism conditions. The chapter contrasts pathological states of hormonal imbalance, including Cushing's syndrome from excessive glucocorticoid exposure, characterized by distinctive physical changes and metabolic dysfunction, and Addison's disease from insufficient adrenal hormone production, presenting with electrolyte abnormalities and cardiovascular instability. Extended glucocorticoid use carries significant risks including hypothalamic-pituitary-adrenal suppression, bone density loss, immunosuppression with increased infection vulnerability, glucose intolerance, and delayed wound healing. Nursing care requires comprehensive baseline and ongoing assessment of fluid status, electrolyte levels, blood glucose, and psychological changes. Critical nursing interventions include patient education regarding medication adherence, the necessity of gradual dose reduction rather than abrupt discontinuation, timing dosing to minimize endocrine suppression, and lifestyle modifications for bone health and infection prevention. Nursing professionals must identify potential drug interactions with diuretics, nonsteroidal anti-inflammatory agents, and vaccines, and maintain awareness of medication safety concerns involving similar drug names. Mastery of adrenal pharmacology enables nurses to optimize therapeutic outcomes while minimizing adverse effects and preventing life-threatening complications.