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</div><div><span>Aldosterone blood test</span></div></div>
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</a><h1 class="with-also" itemprop="name">Aldosterone blood test</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>The aldosterone blood test measures the level of the hormone aldosterone in blood.</p><p>Aldosterone can also be measured using a <a test="test" href="./003621.htm">urine test</a>.</p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>How the Test is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-1"><p>A <a test="test" href="./003423.htm">blood sample is needed</a>.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>How to Prepare for the Test</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-2"><p>Your health care provider may ask you to stop taking certain medicines a few days before the test so that they don't affect the test results. Be sure to tell your provider about all the medicines you take. These include:</p><ul><li>High blood pressure medicines</li><li>Heart medicines</li><li>Nonsteroidal anti-inflammatory drugs (NSAIDs)</li><li>Antacid and ulcer medicines</li><li>Water pills (diuretics)</li></ul><p>Do not stop taking any medicine before talking to your provider. Your provider may recommend that you eat no more than 3 grams of salt (sodium) per day for at least 2 weeks before the test.</p><p>Or, your provider may recommend that you eat your usual amount of salt and also test the amount of <a test="test" href="./003599.htm">sodium in your urine</a>.</p><p>At other times, the aldosterone blood test is done right before and after you receive a salt solution (saline) through the vein (IV) for 2 hours. Be aware that other factors can affect aldosterone measurements, including:</p><ul><li>Pregnancy</li><li>High- or low-sodium diet</li><li>High- or low-potassium diet</li><li>Eating large amounts of black licorice</li><li>Strenuous exercise</li><li>Stress</li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>How the Test will Feel</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-3"><p>When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging sensation. Afterward, there may be some throbbing or a slight bruise. This soon goes away.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Why the Test is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-4" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-4"><p>This test is ordered for the following conditions:</p><ul><li>Certain fluid and <a test="test" href="./002350.htm">electrolyte</a> disorders, most often low or high blood sodium or low potassium</li><li>Hard to control blood pressure</li><li><a test="test" href="./007278.htm">Low blood pressure</a> upon standing (orthostatic hypotension) </li><li>Discovery of an adrenal nodule on an <a test="test" href="./003789.htm">abdominal CT scan</a> or <a test="test" href="./003796.htm">MRI</a> done for a different reason (incidentaloma)</li></ul><p>Aldosterone is a hormone released by the <a test="test" href="./002219.htm">adrenal glands</a>. It helps the body regulate blood pressure. Aldosterone increases the reabsorption of sodium and water and the release of potassium in the kidneys. This action raises blood pressure.</p><p>Aldosterone blood test is often combined with other tests, such as the <a test="test" href="./003698.htm">renin hormone test</a>, to diagnose over- or under-production of aldosterone. The serum potassium and sodium are also often tested along with kidney function.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Normal Results</h2></div><div class="section-button"><button type="submit" aria-controls="section-5" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-5"><p>Normal levels vary:</p><ul><li>Between children, teens, and adults</li><li>Depending on whether you were standing, sitting, or lying down when the blood was drawn </li></ul><p>Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>What Abnormal Results Mean</h2></div><div class="section-button"><button type="submit" aria-controls="section-6" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-6"><p>A higher than normal level of aldosterone may be due to:</p><ul><li><a test="test" href="./000308.htm">Bartter syndrome</a> (group of rare conditions that affect the kidneys)</li><li>Adrenal glands release too much aldosterone hormone (<a test="test" href="./000330.htm">primary hyperaldosteronism</a> - usually due to a benign nodule in the adrenal gland)</li><li>Very low-sodium diet </li><li>Taking blood pressure medicines called mineralocorticoid antagonists</li><li>Abuse of diuretics</li><li><a test="test" href="./000255.htm">Liver cirrhosis</a></li><li><a test="test" href="./000158.htm">Heart failure</a></li><li>Laxative abuse</li></ul><p>A lower than normal level of aldosterone may be due to:</p><ul><li>Adrenal gland disorders, including not releasing enough aldosterone, and a condition called primary adrenal insufficiency (<a test="test" href="./000378.htm">Addison disease</a>)</li><li>Very high-sodium diet </li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Risks</h2></div><div class="section-button"><button type="submit" aria-controls="section-7" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-7"><p>There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.</p><p>Other risks associated with having blood drawn are slight but may include:</p><ul><li>Excessive bleeding</li><li>Fainting or feeling lightheaded</li><li>Multiple punctures to locate veins</li><li><a test="test" href="./007213.htm">Blood accumulating under the skin</a> (hematoma)</li><li>Infection (a slight risk any time the skin is broken) </li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Alternative Names</h2></div><div class="section-button"><button type="submit" aria-controls="section-Alt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Alt"><p>Aldosterone - serum; Addison disease - serum aldosterone; Primary hyperaldosteronism - serum aldosterone; Bartter syndrome - serum aldosterone </p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>References</h2></div><div class="section-button"><button type="submit" aria-controls="section-Ref" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Ref"><p>Guber HA, Oprea M, Russell YX . Evaluation of endocrine function. In: McPherson RA, Pincus MR, eds. <em>Henry's Clinical Diagnosis and Management by Laboratory Methods</em>. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 25.</p><p>Young MJ, Fuller PJ. Mineralocorticoids: physiology, metabolism, receptors, and resistance. In: Robertson RP, ed. <em>DeGroot's Endocrinology</em>. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 88.</p></div></div></section>
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 7/30/2023</h2></div><div class="section-button"><button type="submit" aria-controls="section-version" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<div id="section-version" class="section-body"><p>Updated by: Sandeep K. Dhaliwal, MD, board-certified in Diabetes, Endocrinology, and Metabolism, Springfield, VA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.</p>
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