Relating to the effect of certain reductions in a health benefit plan enrollee’s out-of-pocket expenses for certain prescription drugs on enrollee cost-sharing requirements. H.B. 2668 amends the Insurance Code to require an issuer of a health benefit plan that covers prescription drugs or a pharmacy benefit manager to apply any third-party payment, financial assistance, discount, product voucher, or other reduction in out-of-pocket expenses made by or on behalf of an enrollee for a prescription drug to the enrollee’s deductible, copayment, cost-sharing responsibility, or out-of-pocket maximum applicable to health benefits under the enrollee’s plan.