These fail to indicate recent drug use. A false-negative result can occur when urine is very diluted, for example. Many factors can affect when a test can detect a certain drug. Some factors ...

A 10-panel drug test ... give the sample to the test administrator. When they receive the sample, the lab will test the urine for the 10 different drugs. Some tests offer onsite results that ...

Elon Musk releases negative drug test results responding to ketamine allegations from New York Times report linking substance use to Trump administration role.

At least a trace of one or more drugs was found in your sample. If this happens, another test is done to confirm the result. This second test is more precise and can identify the type of drug.

A woman who falsified drug test results ... noticed a discrepancy in testing forms — some of them looked different. "The results were made to look like a form from an official lab," Lindell ...