Final answer:
The preferred treatment for idiopathic hyperaldosteronism involves using mineralocorticoid receptor antagonists like spironolactone or eplerenone, combined with lifestyle changes like a reduced-sodium diet.
Step-by-step explanation:
The treatment of choice for primary aldosteronism caused by idiopathic hyperaldosteronism is to normalize potassium levels and reduce aldosterone's effect on the body. This is typically achieved through medications like mineralocorticoid receptor antagonists (e.g., spironolactone or eplerenone), which prevent aldosterone from binding to its receptor, thereby negating its effects on sodium reabsorption and potassium secretion.
In addition to pharmaceutical intervention, lifestyle modifications such as adopting a low-sodium diet may also be recommended to manage symptoms and prevent complications.