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</noscript></div><div class="main"><div id="ency_summary"><p>A urine drug screen is used to detect illegal and some prescription drugs in the urine.</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>Before the test, you may be asked to remove all your clothes and wear a hospital gown. You will then be placed in a room where you have no access to your personal items or water. This is so you cannot dilute the sample, or use someone else's urine for the test.</p><p>This test involves collecting a "clean-catch" (midstream) urine sample:</p><ul><li>Wash your hands with soap and water. Dry your hands with a clean towel.</li><li>Men and boys should wipe the head of the penis with a moist cloth or disposable towelette. Before cleaning, gently pull back (retract) the foreskin, if you have one.</li><li>Women and girls need to wash the area between the lips of the vagina with soapy water and rinse well. Or, if instructed, use a disposable towelette to wipe the genital area.</li><li>As you start to urinate, allow a small amount to fall into the toilet bowl. This clears the urethra of contaminants.</li><li>Then, in the container you are given, catch about 1 to 2 ounces (30 to 60 milliliters) of urine. Remove the container from the urine stream.</li><li>Give the container to the health care provider or assistant.</li><li>Wash your hands again with soap and water. </li></ul><p>The sample is then taken to the lab for evaluation.</p></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-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>The test involves only normal urination.</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-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>The test is performed to detect the presence of illegal and some prescription drugs in your urine. Their presence may indicate that you recently used these drugs. Some drugs may remain in your system for several weeks, so the drug test needs to be interpreted carefully.</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-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>No drugs in the urine, unless you are taking medicines prescribed by your health care provider.</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-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>If the test result is positive, another test called gas-chromatography mass spectrometry (GC-MS) may be done to confirm the results. The GC-MS will help tell the difference between a false positive and a true positive. </p><p>In some cases, a positive test will be a false positive. This can result from interfering factors such as some foods, prescription medicines, and other drugs. Your provider will be aware of this possibility.</p></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>Drug screen - urine</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Images</h2></div><div class="section-button"><button type="submit" aria-controls="section-tnails" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<li><img src="//medlineplus.gov/ency/images/ency/tnails/10011t.jpg" alt="Urine sample" title="Urine sample" class="side-img"/><a href="../imagepages/10011.htm">Urine sample</a></li>
</ul></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>Bluth MH, Pincus MR, Abraham NZ. Toxicology and therapeutic drug monitoring. In: McPherson RA, Pincus MR, eds. <em>Henry's Clinical Diagnosis and Management by Laboratory Methods.</em> 24th ed. Philadelphia, PA: Elsevier; 2022:chap 24.</p><p>Breuner CC. Substance abuse. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. <em>Nelson Textbook of Pediatrics. </em>21st ed. Philadelphia, PA: Elsevier; 2020:chap 140.</p><p>Nikolaides JK, Thompson TM. Opioids. In: Walls RM, ed. <em>Rosen's Emergency Medicine: Concepts and Clinical Practice.</em> 10th ed. Philadelphia, PA: Elsevier; 2023:chap 151.
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 1/2/2023</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: Jesse Borke, MD, CPE, FAAEM, FACEP, Attending Physician at Kaiser Permanente, Orange County, CA. 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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