Prescription Drug Benefits; Citing this act as the “Prescription Drug Cost Reduction Act”; providing that pharmacy benefit managers have a fiduciary duty and obligation to specified individuals and entities; requiring group health plans, health insurers, and certain pharmacy benefit managers to base plan beneficiaries’ and insureds’ coinsurance obligations for certain prescription drugs on specified drug prices; providing circumstances under which contracts between health insurers or health maintenance organizations and pharmacy benefit managers are void and against the public policy, etc.