10/26/2026
Starting November 1, Oklahoma drivers can be convicted of DUI even if they are completely sober and legally using medical ma*****na. Because the state treats THC as a Schedule I substance, prosecutors do not need to prove impairment under the law's detectable-substance provisions. Even a trace of THC or an inactive metabolite in the blood can be used as evidence of DUI, as blood tests can detect past ma*****na use long after the high has worn off.
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