Express Scripts Completes Acquisition of Medical Services Company's Pharmacy Services...

Express Scripts Completes Acquisition of Medical Services Company's Pharmacy
Services Division

ST. LOUIS, July 22, 2008 (PRIME NEWSWIRE) -- Express Scripts announced today the
closing of its acquisition of the workers' compensation pharmacy benefit
management (PBM) business of privately held Medical Services Company (MSC) from
Monitor Clipper Partners, a private equity investment firm. Express Scripts is
one of the nation's leading managers of pharmacy benefits for employers,
governments, unions and managed care plans.

"We're pleased that MSC Pharmacy Services is now part of Express Scripts. Their
addition will enhance our leadership in using proven PBM cost-management tools
to drive down costs and improve health outcomes. With this acquisition we
continue our long-standing commitment to provide high level service and clinical
expertise in the workers' compensation arena," said George Paz, Express Scripts
chairman & chief executive officer.

MSC was founded in 1985, and its Pharmacy Services Division focuses on serving
the pharmacy benefit needs of workers' compensation organizations, including
leading workers' compensation insurers and third-party administrators (TPAs), as
well as self-insured corporations and government insurance entities. MSC
Pharmacy Services Division serves more than 500,000 workers' compensation
beneficiaries. Under the terms of the agreement, Express Scripts acquired the
business and related assets for $248 million, subject to certain purchase price
adjustments. The transaction will be neutral to Express Scripts earnings in 2008
and slightly accretive in 2009.

"We are excited about joining with Express Scripts to leverage our combined
talents in servicing the needs of clients and injured workers," said Mitch
Freeman, president of MSC Pharmacy Services.

Express Scripts, Inc. (Nasdaq:ESRX) is one of the largest PBM companies in North
America, providing PBM services to thousands of client groups, including
managed-care organizations, insurance carriers, employers, third-party
administrators, public sector, workers' compensation, and union-sponsored
benefit plans. Express Scripts is headquartered in St. Louis, Missouri. More
information can be found at http://www.express-scripts.com.

SAFE HARBOR STATEMENT

This press release contains forward-looking statements, including, but not
limited to, statements related to the Company's plans, objectives, expectations
(financial and otherwise) or intentions. Actual results may differ significantly
from those projected or suggested in any forward-looking statements. Factors
that may impact these forward-looking statements can be found in the
Management's Discussion and Analysis of Financial Condition and Results of
Operations in our Form 10-Q on file with the SEC. A copy of this form can be
found at the investor relations section of Express Scripts web site at
http://www.express-scripts.com

We do not undertake any obligation to release publicly any revisions to such
forward-looking statements to reflect events or circumstances after the date
hereof or to reflect the occurrence of unanticipated events.

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CONTACT: Express Scripts, Inc.
Investor Contact:
David Myers
314.810.3115
david.myers@express-scripts.com
Media Contact:
Steve Littlejohn
314.996.0981
slittlejohn@express-scripts.com