Medco Health Solutions (MHS) 8-K Other Events

Exhibit 99.3

Global Navigation HelpMedco — Express Scripts Merger Communications Advanced SearchMerger Communications Home Press Releases Frequently Asked Questions Welcome to the Merger Communications Website This site will provide information regarding the Medco — Express Scripts merger as it becomes available. Through this site you will be able to access the latest media announcements and frequently asked questions as well as submit any questions you may have.Pictured: Express-Scripts’ chairman and CEO, George Paz (right), and Medco’s chairman and CEO, David Snow (left), announce the merger of their pharmacy benefit management companies on Thursday morning in St. Louis. The CEOs said the combined company will lead the effort to lower costs of prescription medicines for American families.Cautionary Statement Regarding Forward-Looking Statements This website contains “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements, as they relate to Medco Health Solutions, Inc. or Express Scripts, Inc., the management of either such company or the transaction, involve risks and uncertainties that may cause results to differ materially from those set forth in the statements. No forward-looking statement can be guaranteed, and actual results may differ materially from those projected. Medco and Express Scripts undertake no obligation to publicly update any forwardlooking statement, whether as a result of new information, future events or otherwise. Forward-looking statements are not historical facts, but rather are based on current expectations, estimates, assumptions and projections about the business and future financial results of the pharmacy benefit management and specialty pharmacy industries, and other legal, regulatory and economic developments. We use words such as “anticipates,” “believes,” “plans,” “expects,” “projects,” “future,” “intends,” “may,” “will,” “should,” “could,” “estimates,” “predicts,” “potential,” “continue,” “guidance” and similar expressions to identify these forward-looking statements. Actual results could differ materially from the results contemplated by these forward-looking statements due to a number of factors, including, but not limited to, the possibility that (1) Medco and Express Scripts may be unable to obtain stockholder or regulatory approvals required for the merger or may be required to accept conditions that could reduce the anticipated benefits of the merger as a condition to obtaining regulatory approvals; (2) the length of time necessary to consummate the proposed merger may be longer than anticipated; (3) problems may arise in successfully integrating the businesses of Medco and Express Scripts; (4) the proposed merger may involve unexpected costs; (5) the businesses may suffer as a result of uncertainty surrounding the proposed merger; and (6) the industry may be subject to future risks that are described in SEC reports filed by Medco and Express Scripts.Quick Links Ask a question about the merger Visit BetterRXCare.com See Dave Snow’s video messageDate Headline 07/22/2011 A Message from Dave Snow:Medco Announces Agreement to Merge with Express Scripts more... View ArchivesAnnouncements

Pages — Home Page 1 of 2 https://communications.medco.com/merger/Pages/Home.aspx 7/28/2011 The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties that affect the businesses of Medco and Express Scripts described in their respective Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and other documents filed from time to time with the Securities and Exchange Commission.Additional Information About this Transaction In connection with the proposed merger, Express Scripts will file with the SEC a registration statement on Form S-4 that will include a joint proxy statement of Medco and Express Scripts, and a prospectus of Express Scripts, as well as other relevant documents concerning the proposed merger. Stockholders are urged to read the registration statement and the proxy statement/prospectus contained therein regarding the merger when they become available and any other relevant documents as well as any amendments or supplements to those documents, because they will contain important information. You will be able to obtain a free copy of the proxy statement/prospectus, as well as other filings containing information about Express Scripts and Medco, at the SEC’s Internet site (http://www.sec.gov). You will also be able to obtain these documents, free of charge, in the Investor Relations portion of Medco’s website at http://www.medcohealth.com, under the heading “Investors” and then under “SEC Filings.” Copies of the proxy statement/prospectus and the SEC filings that will be incorporated by reference in the proxy statement/prospectus can also be obtained, free of charge, by directing a request to Investor Relations, 100 Parsons Pond Drive, Franklin Lakes, NJ, 07417, 201-269-3400. Express Scripts and Medco and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the stockholders of Medco in connection with the proposed merger. Information about the directors and executive officers of Medco and their wnership of Medco common stock is set forth in the proxy statement for the Medco 2011 annual meeting of stockholders, as filed with the SEC on a Schedule 14A on April 8, 2011. Information about the directors and executive officers of Express Scripts and their ownership of Express Scripts common stock is set forth in the proxy statement for the Express Scripts 2011 annual meeting of stockholders, as filed with the SEC on a Schedule 14A on March 21, 2011. Additional information regarding the interests of those persons and other persons who may be deemed participants in the merger may be obtained by reading the proxy statement/prospectus regarding the proposed merger when it becomes available. You may obtain free copies of this document as described in the preceding paragraph. Pages — Home Page 2 of 2 https://communications.medco.com/merger/Pages/Home.aspx 7/28/2011