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 ...
A new report from Quest Diagnostics revealed that employees testing positive for fentanyl had surged 400 percent over the past five years. The percentage of employees in the general U.S. workforce who ...
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