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Potassium-sparing diuretics or antikaliuretics [1] refer to drugs that cause diuresis without causing potassium loss in the urine. [2] They are typically used as an adjunct in management of hypertension , cirrhosis , and congestive heart failure . [ 3 ]
The thiazides and potassium-sparing diuretics are considered to be calcium-sparing diuretics. [6] The thiazides cause a net decrease in calcium lost in urine. [7] The potassium-sparing diuretics cause a net increase in calcium lost in urine, but the increase is much smaller than the increase associated with other diuretic classes. [7]
Eplerenone, sold under the brand name Inspra, is an aldosterone antagonist type of potassium-sparing diuretic that is used to treat chronic heart failure and high blood pressure, particularly for people with resistant hypertension due to elevated aldosterone.
[1] [2] Amiloride is classified as a potassium-sparing diuretic. Amiloride is often used together with another diuretic, such as a thiazide or loop diuretic. [2] It is taken by mouth. [1] Onset of action is about two hours and it lasts for about a day. [2] Common side effects include high blood potassium, vomiting, loss of appetite, rash, and ...
The same year, 1959, spironolactone was launched as a potassium-sparing diuretic. It became clear years later that aldosterone antagonists inhibit a specific receptor protein. This protein has high affinity for aldosterone but also for cortisol in humans and corticosterone in mice and rats. For this reason, aldosterone antagonists were called ...
For potassium-sparing diuretics, its common side effects include hyponatremia, hyperkalemia, metabolic acidosis and sexual dysfunction specifically for spironolactone. [4] [5] The use of diuretics should be avoided in patients with severe dehydration, anuria (absence of urine production). [4]
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Hence, aldosterone antagonists are potassium (K +) sparing diuretics. The medication has a slightly delayed onset of action, and so it takes several days for diuresis to occur since the MR is a nuclear receptor which works through regulating gene transcription and gene expression.
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