List of products in the National Drug Code with proprietary name . This medication is used to treat high blood pressure. Indapamide is also used to reduce extra fluid in the body (edema) caused by heart failure. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Indapamide belongs to a class of drugs known as diuretics/"water pills." It works by causing you to make more urine. This helps your body get rid of extra salt and water. This can lessen symptoms such as shortness of breath or swelling in your ankles or feet.