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 diuretic and antihypertensive medication that contains furosemide. It is prescribed to treat high blood pressure and fluid retention caused by heart disease, liver disease, kidney disease, or severe burns. What is Lasix used for? Doctors prescribe Lasix tablets to treat edema (fluid buildup) due to heart failure, liver problems, or kidney disease. They also use it as a blood pressure medication but reserve its use for patients with kidney disease. 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 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. Doctors prescribe Lasix for conditions where the body holds too much fluid. 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. Lasix (furosemide) is used to treat the symptoms of fluid retention (edema) in individuals with congestive heart failure, liver disease or kidney disorder. Learn side effects, dosage, drug interactions, warnings, patient labeling, reviews, and more. Furosemide is a loop diuretic used to treat fluid retention (edema) in people with congestive heart failure, liver disease, or a chronic kidney disorder such as nephrotic syndrome. Lasix is a type of medication known as a loop diuretic that doctors prescribe to treat heart failure, high blood pressure, and edema (fluid accumulation in the body).