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1 Strip = 20 Tablets
Square Pharmaceuticals PLCProduct Description
The combination of Furosemide and Spironolactone is a strategic therapeutic pairing designed to manage refractory edema and congestive heart failure while maintaining electrolyte homeostasis. Furosemide, a potent loop diuretic, acts on the thick ascending limb of the Loop of Henle by inhibiting the Na+_K+_2Cl- symporter, leading to a rapid and significant excretion of sodium, chloride, and water. However, this mechanism also causes significant urinary loss of potassium and magnesium, which can lead to hypokalemia. Spironolactone serves as a physiological antagonist, competing with aldosterone for mineralocorticoid receptors in the distal convoluted tubule and collecting duct. By inhibiting aldosterone-mediated sodium reabsorption and potassium secretion, spironolactone provides a "potassium-sparing" effect that offsets the hypokalemic tendencies of furosemide. This synergistic dual-blockade of the nephron not only enhances overall diuresis but also provides cardiovascular benefits by mitigating the fibrotic effects of excess aldosterone on the myocardium. Clinical administration of this combination requires rigorous monitoring of renal function and serum electrolyte levels, particularly to avoid the risks of hyperkalemia or acute kidney injury. Because spironolactone is a steroid-like compound, long-term use can sometimes lead to anti-androgenic side effects such as gynecomastia or menstrual irregularities. Pharmacokinetically, the rapid onset of furosemide addresses acute fluid volume overload, while the slower-acting spironolactone provides sustained neurohormonal modulation. This combination is particularly indicated for patients with hepatic cirrhosis accompanied by ascites, where a specific ratio (often 40 mg of furosemide to 100 mg of spironolactone) is utilized to maintain "normokalemia" while effectively mobilizing extracellular fluid.
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