eggplant, potatoes, green tomatoes and cauliflower all contain nicotine. the effects on the body are not quite like those of MJ. that it’s addictive is irrelevant to the DUI issue.
Since we’re all being Puritans we should list all intoxicants regardless of actual driving impairment. Automatic jail if you’ve got a nicotine buzz. I’m sure the natural sources of nicotine are so minute as to not reach an intoxicating level (likewise there are trace levels of alcohol and cannabinoids always present in the system). Let’s say not more than one cigarette two hours before driving and absolutely none while driving.