Metolazone is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention. Metolazone treats fluid retention (edema) in people with congestive heart failure, or a kidney disorder such as nephrotic syndrome. This medication is also used to treat high blood pressure (hypertension). Metolazone may also be used for other purposes not listed in this medication guide.
Zaroxolyn (metolazone) is a thiazide water pill that helps prevent your body from absorbing too much salt, which can cause fluid retention. Zaroxolyn is used to treat high blood pressure and congestive heart failure. Zaroxolyn helps you form urine and get rid of excess body water.