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 ...

SECAUCUS, N.J., Sept. 2, 2025 /PRNewswire/ -- The percentage of employees in the general U.S. workforce testing positive for fentanyl in random drug tests far exceeded those in pre-employment testing, ...

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 ...

The DOT's proposed rule would add fentanyl and norfentanyl to mandatory drug testing panels for transportation workers under ...

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 ...

Quest Diagnostics is boosting its capabilities in cancer, paying $300 million to acquire a Johns Hopkins University spinout whose technology identifies cancer cells in order to guide treatment ...