Primary aldosteronism usually results in low blood potassium and often requires the use of potassium chloride as prescribed by the physician to correct hypokalemia. On the one hand, active potassium supplementation, e.g., through oral or intravenous potassium chloride, is necessary to correct hypokalemia. After the initial correction of hypokalemia, appropriate investigations and functional tests, as well as imaging tests, such as CT of the adrenal glands, are performed to determine the diagnosis of primary aldosteronism and which type of primary aldosteronism is present. If it is an aldosterone tumor, complete relief of hyperkalemia can be achieved gradually after removal of the aldosterone tumor by a minimally invasive surgical procedure. In the case of idiopathic aldosteronism, such as that caused by adrenal hyperplasia, treatment with e.g. spironolactone is usually required. In conclusion, patients with primary aldosteronism often require potassium chloride supplementation and/or the use of spironolactone, but this should be done under the supervision of a physician, and potassium chloride in particular should not be used without authorization.