A diuretic is a substance that removes water from the body by
promoting urine formation and the loss of salt (sodium).
Caffeine and alcohol are common diuretics.
Diuretic
medicines include furosemide, hydrochlorothiazide, metolazone, and
spironolactone. These medicines may be used as part of treatment for conditions
that cause swelling from water retention (edema), such as heart failure,
hypertension, or liver or kidney disease.