“It is disturbing to see increased use of fentanyl on the job and in combination with other drugs, given fentanyl’s extreme ...

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 ...

A new nationwide report shows fentanyl is quickly becoming one of the most concerning drugs in the workplace, with random ...

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 percentage of employees in the general U.S. workforce who had tested positive for fentanyl in random drug tests was far higher than in pre-employment.

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 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, N.J., May 26, 2021 /PRNewswire/ — The COVID-19 pandemic did not dampen workforce drug testing positivity for marijuana, which continued to increase last year in the general U.S. workforce, ...

Quest Diagnostics has introduced a new pharmacogenomic (PGx) laboratory testing service designed to assist healthcare providers in understanding their patients' genetic responses to specific ...