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Thiazide diuretics inhibit this receptor, causing the body to release NaCl and water into the lumen, thereby increasing the amount of urine produced each day. [6] An example of a molecule that is chemically a thiazide but not used as a diuretic is methylchloroisothiazolinone, often found as an antimicrobial in cosmetics. [8]
The effect is an electrolyte imbalance similar to that seen with thiazide diuretic therapy (which causes pharmacological inhibition of NCC activity). [4] Gitelman syndrome was formerly considered a subset of Bartter syndrome until the distinct genetic and molecular bases of these disorders were identified.
Blood pressure medications such as loop diuretics (e.g. furosemide) and thiazide diuretics (e.g. hydrochlorothiazide) commonly cause hypokalemia. Other medications such as the antifungal amphotericin B or the cancer drug cisplatin can also cause long-term hypokalemia.
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]
Thiazide diuretics are sometimes combined with amiloride to prevent hypokalemia caused by the thiazides. It seems paradoxical to treat an extreme diuresis with a diuretic, and the exact mechanism of action is unknown but the thiazide diuretics will decrease distal convoluted tubule reabsorption of sodium and water, thereby causing diuresis.
For loop diuretics, thiazide diuretics and thiazide-like diuretics, their common side effects include hypokalemia, hyponatremia, metabolic alkalosis and hyperglycaemia. [4] For potassium-sparing diuretics, its common side effects include hyponatremia, hyperkalemia, metabolic acidosis and sexual dysfunction specifically for spironolactone. [4] [5]
Correction with oral bicarbonate may exacerbate urinary potassium losses and precipitate hypokalemia. [13] As with dRTA, reversal of the chronic acidosis should reverse bone demineralization. [14] Thiazide diuretics can also be used as a treatment by making use of contraction alkalosis caused by them. [citation needed]
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 ]