Generic Lasix, containing the active ingredient furosemide, acts as a powerful loop diuretic, primarily used to treat fluid retention and edema caused by conditions such as heart failure, liver disease, or kidney disease. By promoting increased urine production, it effectively removes excess salt and water from the body, alleviating symptoms such as shortness of breath and swelling. Additionally, it can be used in the treatment of hypertension, especially when other diuretics prove insufficient.