Section 12FF. Any person who, in good faith, attempts to render emergency care by administering naloxone or any other opioid antagonist, as defined in section 19B of chapter 94C, to a person reasonably believed to be experiencing an opiate-related overdose, shall not be liable for acts or omissions resulting from the attempt to render this emergency care; provided, however, that this section shall not apply to acts of gross negligence or willful or wanton misconduct.