Failed workplace drug tests continue to rise in Michigan, largely due to marijuana legalization and normalization. Among all drug categories — marijuana, amphetamines, cocaine and opiates — 6.8% of ...

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 increase in substituted specimens was up 633% in 2023 compared to 2022, said Quest Diagnostics. In the highest rate in more than 30 years of annual reporting, the percentage of employees in the ...

Though the U.S. Food and Drug Administration has not approved THC as a safe and effective drug for any condition, employees are using arguments of medical necessity against employers who don’t ...

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Positive marijuana tests push many drivers out of the industry, aggravating an existing recruiting and retention challenge. Education and messaging can help keep drivers up-to-date on DOT rules—but ...