California Code, Labor Code - LAB § 6723

(d)(1) An individual who administers naloxone hydrochloride or another opioid antagonist approved by the United States Food and Drug Administration to reverse opioid overdose in a suspected opioid overdose emergency shall not be liable for civil damages as provided in Section 1799.113 of the Health and Safety Code if the conditions in that section are met.

(2) In accordance with paragraph (1), an individual who is licensed as part of a local emergency medical services agency shall not be held responsible for administering nasal naloxone hydrochloride or another opioid antagonist approved by the United States Food and Drug Administration to reverse opioid overdose, regardless of whether the individual was certified for that activity, unless the individual was acting as a paid first responder at the time of the action.