What does Preliminary Positive mean?
The Multi-Drug Urine Test is a screening test. It is the first step in a two-step process. Screening tests are not as accurate as laboratory test. It is possible to get a positive result when the person did not take drugs. For example, some medicines and food may cause the screening tests to incorrectly read positive. Things such as diet pills, inhalers and cough syrup can cause a positive result. You consult with your doctor to better understand how medications may interfere with this test.
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