Section 4GG. Any subscription certificate under an individual or group medical service agreement delivered, issued or renewed within the commonwealth shall provide coverage for abuse deterrent opioid drug products listed on the formulary, compiled pursuant to subsection (b) of section 13 of chapter 17, on a basis not less favorable than non-abuse deterrent opioid drug products that are covered by an individual or group medical service agreement. An increase in patient cost sharing shall not be allowed to achieve compliance with this section.