http://www.shouselaw.com/dui-marijuan... 888.327.4652 Arrested for Marijuana DUI? A California drunk driving lawyer explains the laws, penalties & defenses. California DUI law makes it illegal to drive under the influence of marijuana--in spite of studies casting doubt on whether marijuana impairs driving ability at all. Moreover, a person who possesses weed at the time of being arrested for DUI marijuana may face two additional charges. California Vehicle Code 23152(a) VC criminalizes driving under the influence of alcohol and/or drugs. Proving that you're DUI alcohol is definitely the easiest for the prosecution. Proving that you're DUI drugs (DUID) becomes more difficult. Proving that you're DUI marijuana or "dope driving" is perhaps the most challenging. The primary ingredient in marijuana (also commonly referred to as pot, bud, weed, grass, dope, ganja, and Mary Jane) is delta-9-tetrahydrocannabinol or "THC". This chemical lingers in the body long after the effects of ingesting marijuana wear off. For more information or to confidentially discuss your California DUI marijuana case, don't hesitate to contact us. We have local DUI law offices in Rancho Cucamonga, Van Nuys, Orange County and all surrounding Southern California areas.