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Opioid Testing

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Getting tested for opioid use? Opioid testing detects evidence of both illegal and prescription opioids. Learn more about opioid testing in our guide.
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Arthritis Testing

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Arthritis is the leading cause of disability in the United States. Learn about types of arthritis and the role of arthritis testing.
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Troponin Test (cTN)

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Curious about troponin testing? Troponin is a protein released into the bloodstream after a heart attack or damage to the heart.
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Urine Drug Test

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Urine drug tests are the most common method of testing for the use of illegal drugs and the misuse of prescription and over-the-counter medicines.
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Hair Follicle Drug Test

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Considering a hair follicle drug test? Learn about how long drugs can be detected in the hair, which drugs can be identified, and how hair testing works.
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Zika Virus Testing

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The Zika virus is most often spread by infected mosquitoes. Learn about testing for a Zika virus infection, including who should get tested.
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Drug Testing

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Drug testing detects evidence of drug use. Learn about types of drug tests, when drug testing is used, and interpreting drug test results.
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Gout Testing

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Gout is a common form of arthritis that causes episodes of intense pain and swelling in the joints. Learn more about tests that are used to diagnose gout.
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Pleural Fluid Testing

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Pleural fluid testing involves multiple measurements and can help diagnose the cause of fluid buildup around the lungs, which is called a pleural effusion.
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