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The antihypertensive actions of some diuretics (thiazides and loop diuretics in particular) are independent of their diuretic effect. [ 1 ] [ 2 ] That is, the reduction in blood pressure is not due to decreased blood volume resulting from increased urine production , but occurs through other mechanisms and at lower doses than that required to ...
Loop diuretics act on the Na +-K +-2Cl − symporter (NKCC2) in the thick ascending limb of the loop of Henle to inhibit sodium, chloride and potassium reabsorption. This is achieved by competing for the Cl − binding site. Loop diuretics also inhibit NKCC2 at macula densa, reducing sodium transported into
Illustration of the mechanism of action of thiazide diuretics in the distal convoluted tubule of nephrons. Thiazide diuretics control hypertension in part by inhibiting reabsorption of sodium (Na +) and chloride (Cl −) ions from the distal convoluted tubules in the kidneys by blocking the thiazide-sensitive Na +-Cl − symporter. [31]
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 action on the distal tubules is independent of any inhibitory effect on carbonic anhydrase or aldosterone; it also abolishes the corticomedullary osmotic gradient and blocks negative, as well as positive, free water clearance. Because of the large NaCl absorptive capacity of the loop of Henle, diuresis is not limited by the development of ...
Spironolactone, sold under the brand name Aldactone among others, is a diuretic medication primarily used to treat fluid build-up due to heart failure, liver scarring, or kidney disease. [4] It is also used in the treatment of high blood pressure , and low blood potassium that does not improve with supplementation , early puberty in boys, acne ...
An osmotic diuretic is a type of diuretic that inhibits reabsorption of water and sodium (Na). They are pharmacologically inert substances that are given intravenously. They increase the osmolarity of blood and renal filtrate. [1] This fluid eventually becomes urine. Two examples are mannitol [2] and isosorbide.
Hydrochlorothiazide, sold under the brand name Hydrodiuril among others, is a diuretic medication used to treat hypertension and swelling due to fluid build-up. [4] Other uses include treating diabetes insipidus and renal tubular acidosis and to decrease the risk of kidney stones in those with a high calcium level in the urine. [4]