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 ...

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, ...

Overall Drug Positivity Holds Steady at Historically High Rates while Marijuana Positivity Continued Upward Climb in the General U.S. Workforce Marijuana Positivity in the General U.S. Workforce ...

Amid Widespread Recruiting and Retention Challenges, Drug Positivity Increases in Post-Accident Tests at a Faster Rate Than Pre-Employment Tests for Cocaine, Marijuana, Opiates and Oxycodones SECAUCUS ...

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 Americans are failing drug tests because of pot than ever before, and the solutions to the problem range from blaming legalization to dropping drug testing for pot altogether. Quest Diagnostics ...

Secaucus-based Quest Diagnostics said Thursday the U.S. Food and Drug Administration granted emergency use authorization (EUA) for a new laboratory technique that speeds the process of extracting ...

SECAUCUS, N.J., April 11, 2019 /PRNewswire/ -- The rate of workforce drug positivity hit a fourteen-year high in 2018, according to a new analysis released today by Quest Diagnostics (NYSE: DGX), the ...

Quest Diagnostics, the world’s leading provider of diagnostic information services, on Monday said demand for COVID-19 tests “continues to outpace” capacity. Demand for molecular testing is highest in ...

SECAUCUS, N.J., April 21, 2020 /PRNewswire/ -- Quest Diagnostics (NYSE: DGX), the world's leading provider of diagnostic information services, today announced that it has begun to perform antibody ...