Patients with Medical Marijuana Cards in Arizona Can Still Face DUI Charges Eighteen states, including Arizona, have passed legislation allowing residents to use marijuana for medicinal purposes. However, Arizona still has a zero tolerance policy when it comes to intoxication and DUI law, and people with even a trace amount of marijuana in their systems can face DUI charges for having trace THC in their blood. The law hinges on a “secondary metabolite” of marijuana called Carboxy-THC. If the metabolite shows up in a blood sample, the person … [Read more...]