Diuretics cause or increase urine production or urine flow out of the body. Diuretics also decrease extra cellular fluid volume. Diuretics regulate urine production by stimulating or inhibiting the body's natural hormones. Diuresis is increased production of urine by the kidney. Additional Info: Diuretics are used in medicine to treat heart failure, liver cirrhosis, hypertension, and some kidney diseases. Urine contains electrolytes (such as sodium and potassium cations) and metabolic wastes in a watery (aqueous) solution. As the body excretes (expels) more urine, more electrolytes and water diffuse into the blood to replace that lost during urination. Proper electrolyte balance is essential to good health, and diuretics may cause electrolyte imbalance. The most common electrolyte imbalance, hyponatremia, having too little sodium, can result from the use of diuretics. Hypernatremia, too much sodium, can also be caused by diuretics. Sodium imbalances should be corrected gradually because drastic changes in sodium level can cause brain cell shrinkage and damage to the pons region of the brain. Diuretics may also cause hypokalemia, abnormally low potassium level. Patients taking diuretics are sometimes given potassium supplements to prevent hypokalemia, but one should only take these on advice of a physician. Special "potassium-sparing" diuretics are available for those on long-term diuretic therapy. Electrolyte imbalance can be treated with one or more of the following: (1) Fluid and water restriction. (2) Intravenous (IV) solution. (3) Salt tablets. Diuretics such as ephedra are sometimes used as a part of weight loss programs. Care should be taken when taking diuretics to avoid dehydration (excessive body water loss) and electrolyte imbalance. Common household diuretics include coffee, alcohol, and cranberry juice. MSDS Relevance: Some chemicals are diuretics; if ingested, they can cause increased urine production or urine flow. Thiazides and loop diuretics are two common classes of diuretics used in medical treatment. Diuretics may be used to treat ingestion of small quantities of harmful chemicals, such as rodenticides. See also: Antidote, Concentration, Nephrotoxin