Merck, known as MSD outside the U.S. and Canada, announced today that it has formally notified the European Medicines Agency (EMA) of Merck's decision to withdraw the Marketing Authorisation Application (MAA) for ridaforolimus. The application for Marketing Authorisation for ridaforolimus was accepted by the EMA in August 2011. At the time of the withdrawal it was under review by the Agency’s Committee for Medicinal Products for Human Use (CHMP). In its letter to the EMA, Merck said that the withdrawal of ridaforolimus was based on the provisional view of the CHMP that the data available to date and provided in the Marketing Authorisation Application were not sufficient to permit licensure of ridaforolimus in the European Union for the maintenance treatment of patients with soft tissue sarcoma or primary malignant bone tumor. Although the application for these uses was withdrawn, Merck is studying ridaforolimus in combination with other drugs in other tumor types. The withdrawal of the European application of ridaforolimus for the maintenance treatment of patients with soft tissue sarcoma or primary malignant bone tumor does not change Merck’s commitment to the ongoing clinical trials with ridaforolimus. About Ridaforolimus Ridaforolimus is an investigational small-molecule inhibitor of the protein mTOR, a protein that acts as a central regulator of protein synthesis, cell proliferation, cell cycle progression and cell survival, integrating signals from proteins, such as PI3K, AKT and PTEN, known to be important to malignancy. Merck’s Commitment to Oncology Merck is committed to advancing all aspects of cancer care – prevention, treatment and supportive care. Through strong internal research capabilities, selective alliances and acquisitions, and enabling technologies, Merck is looking to lead in the discovery, development and delivery of anticancer therapies. About Merck Today’s Merck is a global healthcare leader working to help the world be well. Merck is known as MSD outside the United States and Canada. Through our prescription medicines, vaccines, biologic therapies, and consumer care and animal health products, we work with customers and operate in more than 140 countries to deliver innovative health solutions. We also demonstrate our commitment to increasing access to healthcare through far-reaching policies, programs and partnerships. For more information, visit www.merck.com and connect with us on Twitter, Facebook and YouTube. Merck Forward-Looking Statement This news release 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 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 management and are subject to significant risks and uncertainties. Actual results may differ from those set forth in the forward-looking statements.