Which medication is contraindicated for a patient diagnosed with acute adrenal insufficiency and hyperkalemia?

Which medication is contraindicated for a patient diagnosed with acute adrenal insufficiency and hyperkalemia?

• A. Spironolactone
• B. Hydrocortisone
• C. Fludrocortisone
• D. Dexamethasone

Answer: (A)

The main idea here is that acute adrenal insufficiency causes a deficiency of both cortisol and aldosterone, leading to salt-wasting, hypotension, and high potassium. The treatment goal is to replace cortisol and support mineralocorticoid activity to improve blood pressure and correct potassium. Hydrocortisone is the best choice because it provides both glucocorticoid and mineralocorticoid effects, helping to stabilize circulation and enhance potassium excretion. Dexamethasone, while a strong glucocorticoid, lacks mineralocorticoid activity, so it’s less ideal for correcting the mineralocorticoid deficiency and associated hyperkalemia. Fludrocortisone adds mineralocorticoid support but is typically used after initial stabilization rather than as the immediate therapy. Spironolactone is contraindicated here because it blocks aldosterone’s action and is potassium-sparing; in a patient with hyperkalemia, it would worsen potassium retention and be dangerous.

The main idea here is that acute adrenal insufficiency causes a deficiency of both cortisol and aldosterone, leading to salt-wasting, hypotension, and high potassium. The treatment goal is to replace cortisol and support mineralocorticoid activity to improve blood pressure and correct potassium. Hydrocortisone is the best choice because it provides both glucocorticoid and mineralocorticoid effects, helping to stabilize circulation and enhance potassium excretion. Dexamethasone, while a strong glucocorticoid, lacks mineralocorticoid activity, so it’s less ideal for correcting the mineralocorticoid deficiency and associated hyperkalemia. Fludrocortisone adds mineralocorticoid support but is typically used after initial stabilization rather than as the immediate therapy. Spironolactone is contraindicated here because it blocks aldosterone’s action and is potassium-sparing; in a patient with hyperkalemia, it would worsen potassium retention and be dangerous.