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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 ]
Potassium-sparing diuretics act to prevent sodium reabsorption in the collecting tubule by either binding ENaCs (amiloride, triamterene) or by inhibiting aldosterone receptors (spironolactone, eplerenone). This prevents excessive excretion of K + in urine and decreased retention of water, preventing hypokalemia. [10]
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]
[2] [3] Other serious side effects may include high blood potassium. [2] [3] Use in pregnancy and breastfeeding is not generally recommended. [2] [3] Use in those with significant kidney problems is not recommended. [2] [3] It decreases blood pressure mainly by hydrochlorothiazide while triamterene decreases the amount of potassium lost. [2] [3]
Triamterene directly blocks the epithelial sodium channel [4] (ENaC) on the lumen side of the kidney collecting tubule. [5]: 127 Other diuretics cause a decrease in the sodium concentration of the forming urine due to the entry of sodium into the cell via the ENaC, and the concomitant exit of potassium from the principal cell into the forming urine.
Loop diuretics are 90% bonded to proteins and are secreted into the proximal convoluted tubule through organic anion transporter 1 (OAT-1), OAT-2, and ABCC4.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.
Potassium-sparing diuretic; T. Triamterene This page was last edited on 4 April 2013, at 23:04 (UTC). Text is available under the Creative Commons Attribution ...
Thiazides combined with potassium citrate, increased water intake and decreased dietary oxalate and sodium can slow or even reverse the formation of calcium-containing kidney stones. [18] High-dose therapy with the thiazide-like diuretic indapamide can be used to treat idiopathic hypercalcinuria (high urine calcium with unknown cause). [19]