Vaping cannabis derivatives like THC and CBD can show signs of a “modest” impairment for up to four hours later, per a study published on Tuesday, December 1, in a study published by JAMA.

“[Our] study shows that cannabis-induced driving impairment varies with cannabis strains,” said study co-author Dr. Johannes Ramaekers in an interview with United Press International news wire service. “The implication for the general public is that the cannabis-induced driving impairment should be acknowledged as a public health risk while taking into account that impairment may differ between cannabis strains and depends on time after use.”

According to the study, the vaping compounds measured in the main ingredients of marijuana is equivalent to that seen in drivers with an elevated blood alcohol content level of 0.05 percent, or roughly half of the legal limit for driving under the influence in most U.S. states, the researchers noted.

You can read the study here.

This is a developing story.

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