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 ...

Doctors often use urine tests to make sure patients taking medication for opioid addiction are sticking with treatment. A new study suggests they may be missing some cheaters. Nearly 8% of these ...

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 ...

FILE - This July 23, 2018 file photo shows packets of buprenorphine, a drug used to control heroin and opioid cravings, in Greenfield, Mass. Doctors often use urine tests to make sure patients taking ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Doctors often use urine tests to make sure ...