On April 16, 2025, Arkansas enacted Act 624 (the Act), an unprecedented law prohibiting pharmacy benefit managers (PBMs) from owning or operating pharmacies in the state. As we discussed in our May 2025 blog post, the law’s passage has already resulted in market disruptions, and PBMs with vertically integrated business models have cautioned that the law will limit patients’ access to drugs and cost many local jobs.

Now, two of the nation’s largest PBMs, CVS Health and Cigna’s Express Scripts (ESI), have filed federal lawsuits seeking to block implementation of the Act on the grounds that the Act is unconstitutional, preempted by federal law, and harmful to Arkansans.

Industry Pushback: Legal and Operational Threats

Within weeks of the law’s signing, CVS and Express Scripts filed suit in

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