Walgreen, the largest U.S. drugstore chain, stopped filling prescriptions in January for members of Express Scripts, which manages prescription drug benefits for employers and other clients, after the two companies failed to agree on terms to renew their contract.

In September, Express Scripts filed an injunction in federal court in Illinois alleging Walgreen published false marketing materials designed to encourage Medicare recipients to leave health plans that are Express Scripts clients.

Walgreen at the time countered that it was important to inform people about the impact should Walgreen leave the Express Scripts network.

Walgreen said in a statement on Friday that the dismissal of the claims has "no impact on the parties' ability or inability to come to terms" on a new deal.

(Reporting By Phil Wahba)

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