A diuretic, also known as water pills, is something that causes an individual to urinate more frequently, thus increasing the rate at which water and salt leaves the body. For those looking to lose weight, but find their bodies retaining water, a diuretic helps to relieve this problem. There are many different form of diuretics that work in a variety of ways, but each with the effect of escalating water loss through urination. Diuretics are not only used for weight loss, but can also be used for a variety of medical conditions including high blood pressure, edema, and hypertension. Though diuretics can help lose water weight, and can also have other health benefits.