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A large group of medical experts known as the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure recommends that most people should try thiazide diuretics as the first choice to treat high blood pressure and heart problems related to high blood pressure. If diuretics alone aren't enough to lower your blood pressure, your doctor may also recommend adding medications such as beta blockers, calcium channel blockers, angiotensin-converting enzyme (ACE) inhibitors or angiotensin II receptor blockers to your blood pressure treatment.
In addition, doctors prescribe certain diuretics to prevent, treat or improve symptoms in a variety of conditions, such as:
Diuretics are generally safe, but do have some side effects. The most common side effect of diuretics is increased urination. This occurs most frequently in people taking loop diuretics. For most people, this side effect improves within a few weeks of taking a diuretic. People who take diuretics may also develop too much potassium in their blood (hyperkalemia) if they take a potassium-sparing diuretic, or too little potassium in their blood (hypokalemia) if they take a thiazide diuretic.
Other side effects of diuretics may include:
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