A new study found “no significant impact” on driving ability after smoking CBD-rich marijuana and no effects on vital signs, even though all study participants had exceeded the legal limit for THC in their blood, first reported Marijuana Moment.

In Switzerland, 33 participants were each given a joint containing tobacco and either CBD-rich marijuana or a placebo. Researchers then conducted multiple common DUI tests.

According to the researchers from the Institute of Forensic Medicine at the University of Bern, the purpose of the study was “to inform recommendations for warnings on tobacco substitute products containing CBD-rich marijuana and to provide information for drivers regarding the possible risks of consuming CBD-rich marijuana.”

No Signs Of Impairment Were Observed

“Although free THC concentrations reached levels that were considered to cause symptoms of impairment in other studies in which THC-rich marijuana was smoked, no signs of impairment were observed in the current study," according to the study. 

Researchers recommended that consumers refrain from driving for several hours after smoking CBD-rich marijuana, as legal THC concentration limits can be exceeded.

Original publication: December 17, 2021