osmotic diuretics

osmotic diuretics
diuretics such as mannitol that are filtered at the glomerulus and reabsorbed in the renal tubule only to a limited extent; they thus increase the amount of osmotically active solute in the urine with a corresponding increase in urine volume, and increase the osmolality of plasma. They also increase diffusion of water from the intraocular and cerebrospinal fluids and so are often used for reducing the pressure and volume of these fluids.

Medical dictionary. 2011.

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