How Drug Tests Work?

What drugs can be detected in a urine test?

Once a drug is consumed, the detection of that drug uses metabolites excreted from urine as a way to screen for that drug in a urine test. It can take a minimum of 1 – 7 hours in the system in order to be detectable in urine depending on the drug panel test. This is because the drug must be metabolized before urine drug screen tests are able to detect the presence of that drug. It is also why many rely on urine drug tests to detect the drug longer in the system versus other types of drug testing, such...

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Accuracy and Reliability of Drug Tests

Having reliable test results for at-home drug tests has to do with quite a few factors: type of test, avoiding human error, and understanding results. Drug screening includes options such as: urine test, hair and saliva drug tests, and blood testing. Accuracy and reliability are important for results you can trust. Using the correct test and following the instruction procedure closely will help you get the best results and read them correctly, whether a negative or positive result.   Blood tests are the most accurate drug tests but are also the most expensive option. Another challenge with blood tests is that...

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Determining Easy@Home Drug Testing Results

Sometimes determining your drug test result can be confusing. Following the directions closely is essential for getting the most accurate results.   What else is important to remember when reading your result?   A faint line is always a negative result if a control line is present. Without a control line present, the test is invalid. Negative results will appear as soon as 2 minutes, and positive results can be read in up to 5 minutes. Results after 5 minutes are always invalid. There are some things to consider when determining your urine drug test result:   Think about the...

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Drug Test Panels and Cutoff Levels

 Test panels and cutoff levels are two main parts of the drug testing process. The drug test panels indicate which drug is being tested by the 3 letter initials such as THC, COC and OXY. Below the panels are the testing windows. This is where the test (T) and control (C) lines will appear.   If the test line appears, the result is negative. The darkness of the test line does not matter. As long as a test line appears, the result is negative. No test line means the result is positive.  A control line should be present during...

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Understanding False Positive and False Negative Results

What is a false positive for drug tests? A false positive is a positive test result when the person actually should have a negative result. It can happen when a medication cross-reacts with the immunoassay. This is due to a similar structure in common substances. Over-the-counter medications, other prescribed medications, and certain foods can cause a false positive. What are some common reasons for a false positive due to cross-reaction? Natural Herbal Supplements and Vitamin Supplements– Among the most notable are Vitamin B supplements; these can give a false positive for THC. Ibuprofen –this over-the-counter pain reliever could also give false...

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Drug Screening CPT Codes

Toxicology CPT Code Changes                    

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