The Oklahoma Medical Marijuana Authority is working to open a state-run testing laboratory to verify product safety. The lab, located in Oklahoma City, is expected to be operational by early February.

The percentage of employees in the general U.S. workforce testing positive for marijuana following an on-the-job accident increased to its highest level in 25 years in 2022, according to an analysis ...

The legalization of cannabis in Massachusetts and other states has added to a shortage of drivers licensed to operate snowplows, tractor-trailers and other heavy equipment. That's the gist of a recent ...

Federal law doesn’t limit drug testing for marijuana, but state laws do vary, with some states restricting testing or discrimination based on cannabis use. In 2023, Ohio became the 24th state to ...

Cannabis regulators have ordered one of the state’s independent testing labs to suspend operations, alleging a “pattern of failing to accurately report” marijuana test results and “an intentional ...