The implications of potential false-positive urine drug screen (UDS ... Verification of the test results with a different screening test or additional analytical tests should be performed to ...

Thousands of inmates wrongly tested positive for opiate use inside California state prisons last year because of a laboratory ...

Researchers find that xylazine test strips, while useful harm reduction tools, have some significant limitations to be aware ...

Marcus Davis had filed a federal lawsuit after he was fired in 2022 following what he says was a "false positive" drug test.