More and more workers are cheating on drug tests, according to new data from Quest Diagnostics, with tampering rates reaching a 30-year high in 2023. After analyzing nearly 9.8 million workforce drug ...

More and more workers in the U.S. are testing positive for fentanyl use during random drug tests, according to new data from Quest Diagnostics. After analyzing more than 8 million workforce drug tests ...

The rate of substituted or invalid drug tests — an indication of tampering to hide drug use — rose more than six-fold in 2023 versus the prior year, according to a Quest Diagnostics analysis of 9.8 ...

SAN ANTONIO – Data from prominent drug testing center Quest Diagnostics shows the number of tests detecting fentanyl has doubled since 2020. The company has tracked substances detected since 1988 and ...

Type "beat the drug test" into an Internet search engine, and you come up with more than 100 Web sites devoted to helping foil workplace drug screening. It's part of a technology race, or as Barry ...