There is a pathophysiological entity characterized by water retention in different tissues, the edema, whose basic medication is mainly based on the excretion of that water surplus through the renal system, by means of drugs that increase the diuretic activity, the so called diuretics. DIURETIC significantly increases water excretion through the renal system (renotropic activity) and, what is more important for the treatment of edema, the excretion of sodium through the same route, as water follows it passively due to the osmotic activity. DIURETIC is one of the most powerful diuretics – saluretics. Thanks to its administration, edema and its concomitant effects are eliminated in a short time, keeping potassium excretion at a low level. DIURETIC’s powerful activity enables to manage urine output as necessary, adapting the dose to be administered according to the severity and evolution of the disease.