Because diuretics may reduce the volume of fluid in the body which may reduce blood pressure, you may become light-headed or even faint when you stand, particularly if you are also taking other medicines for high blood pressure. If you have such symptoms, report them to your doctor right away. Diuretics may raise the level of uric acid in your blood and increase your risk of gout. They may also increase blood sugar, which can aggravate diabetes. All drugs can cause allergic reactions, but diuretics rarely do.
Diuretics are very useful drugs and are very safe when used as prescribed.
All of these act in varying ways on the kidneys and may need monitoring in slightly different ways. Your doctor can explain more why a particular diurectic was chosen and what are the special side effects to watch for. Table of Contents Disclaimer .