Which Health and Safety Code addresses being under the influence of controlled substances?

• A. HS 11350
• B. HS 11550
• C. HS 11357
• D. HS 11377

Answer: (B)

Being under the influence of a controlled substance is addressed by Health and Safety Code Section 11550. This provision specifically makes it illegal to use or be under the influence of any controlled substance, separate from offenses related to possession or sale. The other sections listed cover possession of controlled substances (and related offenses), not the act of being under the influence. So 11550 is the statute that directly targets being under the influence.