Lasix is a potent diuretic medication primarily used to treat fluid retention (edema) and high blood pressure (hypertension). Its active ingredient, furosemide, works by increasing urine production, which helps the body eliminate excess water and salt. This reduces swelling in the legs, ankles, and abdomen, as well as lowers blood pressure. Lasix is particularly effective in managing conditions such as congestive heart failure, liver disease, and kidney disorders. It is also used to treat pulmonary edema, a life-threatening condition where fluid accumulates in the lungs. Lasix is fast-acting and provides significant relief for patients experiencing fluid overload.