A-C Carbamide
Indications: Edema, water retention symptom, excess sweating, excess or diminished kidney and bladder function, nightmares, glaucoma, gastritis, and acidosis.
Guyton's Textbook of Medical Physiology describes carbamide (urea) as an "osmotic diuretic." It is the osmotic pressure that prevents further fluid reabsorption "so that large amounts of tubular fluid flush on into the urine." Carbamide lowers the osmotic pressure in the extra-stitial fluids.
Carbamide improves the osmotic transfer of fluids though the cell walls. Osmosis carries fluids right through solid barriers. If you get too much fluid in your eye and it can't get out, it builds up terrific pressure--this is called glaucoma. In many cases, Carbamide helps get the excess out. The government says that carbamide is inert, and it can't be used as a food or a supplement, so it is sold with Cataplex A and Cataplex C in this form, in a carrier of carbamide powder. It's especially helpful for people who start retaining water when they increase their sodium intake.