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Quinethazone, marketed as Hydromox, is a thiazide diuretic indicated for hypertension. Patients may experience adverse reactions such as dizziness, dry mouth, nausea, and hypokalemia.
Quinethazone, marketed as Hydromox, is a thiazide diuretic indicated for hypertension. Patients may experience adverse reactions such as dizziness, dry mouth, nausea, and hypokalemia.
As a diuretic, quinethazone inhibits active chloride reabsorption at the early distal tubule via the Na-Cl cotransporter, resulting in an increase in the excretion of sodium, chloride, and water. Thiazides like quinethazone also inhibit sodium ion transport across the renal tubular epithelium through binding to the thiazide sensitive sodium-chloride transporter. This results in an increase in potassium excretion via the sodium-potassium exchange mechanism. The antihypertensive mechanism of quinethazone is less well understood although it may be mediated through its action on carbonic anhydrases in the smooth muscle or through its action on the large-conductance calcium-activated potassium (KCa) channel, also found in the smooth muscle.
Used to treat hypertension.
