According to a clinical trial published in the Journal of Analytical Toxicology, the oral use of 100mg of cannabidiol (CBD) is not associated with a positive drug test result for marijuana.
Researchers associated with John Hopkins University School of Medicine completed urinalysis examinations of people after their use of CBD, CBD-dominant vaporized cannabis, and a placebo, NORML noted.
The consumption of oral CBD did not cause carboxy-THC to be present in the urine tests. However, the administration of vaporized cannabis with CBD content of 10.5% and THC content of 0.39% did yield a positive drug test result for marijuana in some of the people.
“These data indicate that acute dosing of pure CBD will not result in a positive urine drug test using current federal workplace drug testing guidelines,” the researchers noted. “However, CBD products that also contain ∆9-THC may produce positive urine results for ∆9-THC-COOH. Accurate labeling and regulation of ∆9-THC content in CBD/hemp products are needed to prevent unexpected positive drug tests and unintended drug effects.”