Merck and Schering-Plough Receive Request for Additional Information from FTC Regarding Proposed Merger

Business Wire, June 22, 2009

WHITEHOUSE STATION, N.J. & KENILWORTH, N.J. -- Merck & Co., Inc. (NYSE: MRK) and Schering-Plough Corporation (NYSE: SGP) today announced that they each have received a request for additional information from the U.S. Federal Trade Commission (FTC) with respect to their previously announced proposed merger. The request for information from the FTC, often referred to as a “second request,” was anticipated as part of the regulatory process under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (HSR Act).

Merck and Schering-Plough intend to cooperate fully with the FTC to obtain approval of the transaction as expeditiously as possible. The transaction is subject to approval by Merck and Schering-Plough shareholders and the satisfaction of customary closing conditions and regulatory approvals, including expiration or termination of the applicable waiting period under the HSR Act, as amended, as well as clearance by the European Commission under the EC Merger Regulation and certain other foreign jurisdictions. Until the merger closes, both companies will continue to operate independently. Merck and Schering-Plough continue to expect the transaction to close during the fourth quarter of 2009.

About Merck

Merck & Co., Inc. is a global research-driven pharmaceutical company dedicated to putting patients first. Established in 1891, Merck discovers, develops, manufactures and markets vaccines and medicines to address unmet medical needs. The Company devotes extensive efforts to increase access to medicines through far-reaching programs that not only donate Merck medicines but help deliver them to the people who need them. Merck also publishes unbiased health information as a not-for-profit service. For more information, visit www.merck.com.

About Schering-Plough

Schering-Plough is an innovation-driven, science-centered global health care company. Through its own biopharmaceutical research and collaborations with partners, Schering-Plough creates therapies that help save and improve lives around the world. The company applies its research-and-development platform to human prescription, animal health and consumer health care products. Schering-Plough’s vision is to “Earn Trust, Every Day” with the doctors, patients, customers and other stakeholders served by its colleagues around the world. The company is based in Kenilworth, N.J., and its Web site is www.schering-plough.com.

Merck Forward-Looking Statement

This communication includes “forward-looking statements” within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995. Such statements may include, but are not limited to, statements about the benefits of the proposed merger between Merck and Schering-Plough, including future financial and operating results, the combined company’s plans, objectives, expectations and intentions and other statements that are not historical facts. Such statements are based upon the current beliefs and expectations of Merck’s and Schering-Plough’s management and are subject to significant risks and uncertainties. Actual results may differ from those set forth in the forward-looking statements.

The following factors, among others, could cause actual results to differ from those set forth in the forward-looking statements: the possibility that the expected synergies from the proposed merger of Merck and Schering-Plough will not be realized, or will not be realized within the expected time period, due to, among other things, the impact of pharmaceutical industry regulation and pending legislation that could affect the pharmaceutical industry; the ability to obtain governmental and self-regulatory organization approvals of the merger on the proposed terms and schedule; the actual terms of the financing required for the merger and/or the failure to obtain such financing; the failure of Schering-Plough or Merck stockholders to approve the merger; the risk that the businesses will not be integrated successfully; disruption from the merger making it more difficult to maintain business and operational relationships; the possibility that the merger does not close, including, but not limited to, due to the failure to satisfy the closing conditions; Merck’s and Schering-Plough’s ability to accurately predict future market conditions; dependence on the effectiveness of Merck’s and Schering-Plough’s patents and other protections for innovative products; the risk of new and changing regulation and health policies in the U.S. and internationally and the exposure to litigation and/or regulatory actions. Merck undertakes no obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise. Additional factors that could cause results to differ materially from those described in the forward-looking statements can be found in Merck’s 2008 Annual Report on Form 10-K, Schering-Plough’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2009, the registration statement filed by Schering-Plough on June 16, 2009, the preliminary proxy statement filed by Merck on June 16, 2009, and each company’s other filings with the Securities and Exchange Commission (the “SEC”) available at the SEC’s Internet site (www.sec.gov).