Boceprevir, 
                    Merck's Investigational Oral Hepatitis C Protease Inhibitor, 
                    Receives FDA Priority Review and EMA Accelerated Assessment
                   Whitehouse 
                    Station, N.J., USA -- January 6, 2011 -- Merck, known as MSD 
                    outside the United States and Canada, announced today that 
                    regulatory applications for boceprevir, Merck's investigational 
                    oral hepatitis C virus (HCV) protease inhibitor, were submitted 
                    in 2010 and have been accepted for expedited review in both 
                    the U.S. and the European Union.
Whitehouse 
                    Station, N.J., USA -- January 6, 2011 -- Merck, known as MSD 
                    outside the United States and Canada, announced today that 
                    regulatory applications for boceprevir, Merck's investigational 
                    oral hepatitis C virus (HCV) protease inhibitor, were submitted 
                    in 2010 and have been accepted for expedited review in both 
                    the U.S. and the European Union. 
                    
                    The U.S. Food and Drug Administration (FDA) granted the New 
                    Drug Application (NDA) for boceprevir Priority Review status, 
                    a designation given to drugs that offer major advances in 
                    treatment, or provide a treatment where no adequate therapy 
                    exists. FDA's goal for completing a Priority Review is six 
                    months. 
                    
                    Additionally, the European Medicines Agency (EMA) accepted 
                    the Marketing Authorization Application (MAA) for boceprevir 
                    for accelerated assessment. Accelerated assessment is available 
                    for products that respond to unmet medical needs or represent 
                    a significant improvement over current treatment options within 
                    a major public health interest such as treatment of hepatitis 
                    C virus infection. 
                    
                    Data in the NDA and MAA have been provided in support of the 
                    proposed use of boceprevir for the treatment of chronic HCV 
                    genotype 1 infection, in combination with standard therapy, 
                    in adult patients with compensated liver disease who are previously 
                    untreated or who have failed previous therapy. 
                    
                    "We are pleased that the FDA and EMA have accepted boceprevir 
                    for expedited review. Our goal is to be able to bring forward 
                    a new treatment option for patients living with chronic hepatitis 
                    C, and we are now closer to that goal," said Dr. Peter 
                    S. Kim, PhD, president, Merck Research Laboratories. 
                    
                    Merck's global commitment to advancing 
                    hepatitis therapy
                    
                    Merck is committed to building on its strong legacy in the 
                    field of viral hepatitis by continuing to discover, develop 
                    and deliver vaccines and medicines to help prevent and treat 
                    viral hepatitis. Extensive research efforts are underway to 
                    develop differentiated oral therapies that bring innovation 
                    to viral hepatitis care. 
                    
                    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, 
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                    to deliver innovative health solutions. We also demonstrate 
                    our commitment to increasing access to healthcare through 
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