By eHow Health Editor
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A diuretic is any substance that increases the production of urine. There are four general categories: high ceiling, osmotic, potassium-sparing and thiazides. Each of these groups increase urination, but does so in a different way. A diuretic is most often used medically to treat edema, heart failure, hypertension and some kidney disease, but it also is taken as a weight-loss aid. Here's how to lose weight with diuretics.
eHow Health Editor