Formulary Restrictions and Relapse Episodes in Persons With Relapsing-Remitting Multiple Sclerosis.

ABSTRACT:

Importance

Narrow formularies can be used to increase rebates and manage the use of costly drug therapies in the US.

Objective

To examine the association between the breadth of formulary coverage for multiple sclerosis (MS) disease-modifying therapies (DMTs) and MS relapse.

Design, setting, and participants

This retrospective cohort study analyzed 100% Medicare administrative data from 2018 to 2022. The data analysis was conducted from August 1, 2024, to January 30, 2025. Beneficiaries with stand-alone prescription drug plans (PDPs) and Medicare Advantage Prescription Drug plans (MA-PDs) were followed for at least 5 quarters (baseline, quarters 1-4; follow-up, quarter 5). Calendar periods reflected formulary decision-making. Beneficiaries in the same Medicare Part D p

SUBMITTER: Blaylock B 

PROVIDER: S-EPMC12317357 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature