It’s illegal to drive a vehicle when you are under the influence of cannabis – medical or recreational. Yes, even if you have a cannabis recommendation in California. You are prohibited from driving under the influence of the drug. Period.
More info at: https://www.onlinemedicalcard.com/blog/cannabis-and-driving-is-it-legal-if-you-have-cannabis-recommendation-in-california/
Get you cannabis recommendation in california now: https://www.onlinemedicalcard.com/mmj-card/california/