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The term “drug” means any substance or combination of substances, other than alcohol, which could so affect the nervous system, brain, or muscles of a person as to impair, to an appreciable degree, his ability to drive a vehicle in the manner that an ordinarily prudent and cautious man, in full possession of his faculties, using reasonable care, would drive a similar vehicle under like conditions.
Cite this article: FindLaw.com - California Code, Vehicle Code - VEH § 312 - last updated January 01, 2019 | https://codes.findlaw.com/ca/vehicle-code/veh-sect-312.html
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