Patients with commercial health insurance are facing increasing out-of-pocket costs for their medicines in the form of growing deductibles, copayments and coinsurance. Health insurers continue to shift costs to patients, despite evidence that high-cost sharing can lead patients to ration medicines or fail to fill their prescriptions altogether, resulting in worse health outcomes for patients and higher health care costs overall. Without capping this cost sharing burden, patients will continue to struggle to afford the medicines they need.