This report is a part of a series of studies that examine the impact of drug formularies in five states (Arkansas, California, Indiana, Kentucky, and New York) that implemented formularies in 2018 and 2019. As of January 1, 2023, 17  states have adopted drug formularies, with several other states considering implementation. Findings from this study should therefore be of interest to stakeholders in Arkansas as well as those in other states considering the implementation of drug formularies in their jurisdictions. 

In this study, we examine the impact of the implementation of the Arkansas workers’ compensation formulary on prescription drug utilization and costs, using detailed transaction data for prescriptions filled between January 1, 2016, and March 31, 2021, by workers within 12 months of injury. The Arkansas formulary went into effect for claims with injuries on or after July 1, 2018.  

Monitoring Trends after Adoption of Arkansas’ Drug Formulary. Vennela Thumula and Te-Chun Liu. March 2023. WC-23-21.

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