Walgreens today announced a multi-year pharmacy network agreement with Express Scripts -- about seven months after the two parted ways at the end of last year after being unable to agree on a new contract. The new agreement, which takes effect September 15th, means Express Scripts customers will be able to go to Walgreens again to get prescriptions filled.  Terms of the new contract between the nation's largest drugstore chain and the nation's largest pharmacy benefits manager were not disclosed.

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