Comparing Loop Diuretics: Furosemide Versus Bumetanide

Loop diuretics are widely used in the treatment of hypertension and edema caused by cardiovascular, renal, and hepatic dysfunction. Furosemide and bumetanide are 2 of the more commonly prescribed loop diuretics. Sharing a common mechanism of action of blocking the Na+-K+-2Cl- cotransporter in the thick ascending loop of Henle, these drugs can be used to promote diuresis and electrolyte excretion. This article reviews the uses of these loop diuretics and compares and contrasts the pharmacology, efficacy in treating congestive heart failure, adverse effects, and clinical trials comparing the 2 drugs to evaluate whether one drug has higher efficacy and under which circumstances it is preferable to use one drug over another. Numerous studies have shown that furosemide and bumetanide are both equally effective in treating congestive heart failure and the peripheral edema associated with it. As they both possess side effects that can be caused by low electrolyte levels, it is important to monitor these values during administration. Furosemide possesses a lower relative dose ratio to bumetanide, allowing the dosage to be more easily titrated for individual requirements, while bumetanide has a lower risk of ototoxicity and has a higher bioavailability.