A Lansing lawmaker wants the state to rely on THC levels in a driver’s blood to determine if they are impaired by marijuana.
Delta 9-tetrahydrocannabinol, commonly called ∆9-THC or simply THC, is the main psychoactive ingredient in cannabis. Determining when someone is impaired by it has been a major challenge as states decriminalize marijuana.
The bill introduced by Republican State Representative Pamela Hornberger would make it a crime to drive with THC levels above 5 nanograms per milliliter of blood.
That limit would apply the same limits to the compounds 11-OH-THC and THC-COOH, which are metabolites of ∆9-THC. That means your body breaks THC down into those compounds over time.