(a) For the purpose of this section, the term ''opioid antagonist'' shall mean, unless the context clearly requires otherwise, any drug approved by the United States Food and Drug Administration for the treatment of persons experiencing an opioid overdose.
(b) A pharmacist dispensing an opioid contained in Schedule II of section 3 shall inform the patient on the potential adverse risks of the prescription opioid and shall offer to dispense an opioid antagonist to the patient, and where applicable, to a designee of the patient, or for a patient who is a minor, to the minor's parent or guardian.