Formulary Coverage of Esketamine and Ketamine for Depression in Ohio Health Insurance Marketplace and Medicaid Plans.

For more than 2 decades, intravenous ketamine has been demonstrated to have rapid antidepressant effects. However, access to this generic drug is limited due to insurers claiming it is "experimental" because ketamine does not have a Food and Drug Administration indication for depression. In contrast, intranasal esketamine, an enantiomer of ketamine, is approved by the Food and Drug Administration for depression and is still under patent. The goal of this column is to provide a clearer understanding of formulary coverage of these similar medications by insurers. Formularies of all 2023 Ohio Health Insurance Marketplace and Medicaid plans were reviewed to determine the inclusion status of intravenous ketamine and intranasal esketamine for depression. This review found that intravenous ketamine was not covered by any Marketplace or Medicaid plan for depression, while intranasal esketamine was on 72.7% and 100% of formularies, respectively. Thus, members of the analyzed insurance plans can more easily access intranasal esketamine than intravenous ketamine for depression, despite the latter being more cost-effective and possibly more efficacious.