Lasix (furosemide) is an anthranilic acid derivative that is used as a strong diuretic in adults and children to treat excessive fluid accumulation (edema) caused by congestive heart failure, liver failure, renal failure, and nephritic syndrome. Furosemide is a diuretic, also called a water pill, that is commonly used to reduce edema (fluid retention) caused by the following conditions. Furosemide may also be used to treat high blood. Lasix is a loop diuretic (water pill) that prevents your body from absorbing too much salt, causing it to be passed in your urine. Lasix treats fluid retention (edema) in people with congestive heart failure, liver disease, or kidney disorders such as nephrotic syndrome. Furosemide is a potent diuretic which, if given in excessive amounts, can lead to a profound diuresis with water and electrolyte depletion. Careful medical supervision is required, and the dose schedule must be adjusted to the individual patient's needs. Lasix is a loop diuretic. The FDA approved it in 1966. It blocks a salt and water channel in the loop of Henle. This is the part of the kidney that reabsorbs most salt and water. By blocking it, Lasix sends salt and water into the urine instead of back into the blood. The result is rapid fluid loss. You urinate more. Furosemide, sold under the brand name Lasix among others, is a loop diuretic medication used to treat edema due to heart failure, liver scarring, or kidney disease. [6] Furosemide (Lasix) is a potent diuretic (water pill) that is used to eliminate water and salt from the body. In the kidneys, salt (composed of sodium and chloride), water, and other small molecules normally are filtered out of the blood and into the tubules of the kidney. Diuretics ― also known as water pills ― are medicines that help you move extra fluid and salt out of your body. They make you pee more frequently, which is why you should take them in the morning if you can. You may need to take diuretics once or twice a day at the same time each day. Furosemide belongs to a group of medicines called loop diuretics (also known as water pills). Furosemide is given to help treat fluid retention (edema) and swelling that is caused by congestive heart failure, liver disease, kidney disease, or other medical conditions. Furosemide (Lasix) is a loop diuretic (water pill) that makes you urinate more. It works in the kidneys to get rid of extra water and electrolytes (like sodium and potassium), which helps ease swelling and lowers blood pressure.