Data From Merck’s Investigational Hepatitis C Treatment Portfolio To Be Presented At The 64th American Association For The Study Of Liver Diseases Annual Meeting

Merck (NYSE:MRK), known as MSD outside the United States and Canada, today announced the presentation of data from studies evaluating the company’s investigational oral chronic hepatitis C virus (HCV) treatments MK-5172 and MK-8742 at the 64 th American Association for the Study of Liver Diseases Annual Meeting (AASLD). The meeting is scheduled to take place in Washington, D.C., Nov. 1-5, 2013.

“Merck is committed to developing HCV therapies that have the potential to offer new options for a broad range of patient types,” said Dr. Eliav Barr, vice president, Infectious Diseases, Merck Research Laboratories. “We continue to build upon our strong legacy in HCV and look forward to sharing the latest clinical data for our investigational HCV therapies, MK-5172 and MK-8742.”

MK-5172 is an investigational, once-daily, oral HCV NS3/4A protease inhibitor currently in Phase IIB development. MK-8742 is an investigational, once-daily, oral HCV NS5A replication complex inhibitor currently in Phase IIB development. Both candidates are being evaluated in broad clinical programs that include investigations in various HCV segments, multiple HCV genotypes and patients who have previously failed prior therapy.

Selected presentations of clinical data for MK-5172 and MK-8742
  • High Efficacy and Safety of the All-Oral Combination Regimen, MK-5172/MK-8742 +/- RBV for 12 Weeks in HCV Genotype 1 Infected Patients: The C-WORTHY Study. Lawitz, E., et al. Oral Presentation #76: Sunday, Nov. 3, 2013, 5:30-5:45 p.m.
  • Kinetic Analyses of Antiviral Suppression by NS5A Inhibitors Reveal Early and Potent Inhibition of Viral Assembly and Release. McGivern, D.R., et al. Oral Presentation #78: Sunday, Nov. 3, 2013, 6:00-6:15 p.m.
  • High Efficacy at Lower Doses of MK-5172 25mg and 50mg Daily for 12 weeks in HCV Genotype (G) 1 Treatment-Naïve Non-Cirrhotic Patients. Vierling, J., N et al. Poster #1123. Sunday, Nov. 3, 2013, 8:00 a.m. to 5:30 p.m.
  • Efficacy and Safety of an Interferon-Free Regimen of MK-5172 + Ribavirin for 12 Weeks or 24 Weeks in Treatment-Naïve, Non-Cirrhotic Subjects with HCV GT1 Infection: The C-SPIRIT Study. Gane, E.J., et al., Poster #1110. Sunday, Nov. 3, 2013, 8:00 a.m. to 5:30 p.m.
  • MK-8742, a HCV NS5A Inhibitor with a Broad Spectrum of HCV Genotypic Activity, Demonstrates Potent Antiviral Activity in Genotype-1 and -3 HCV-Infected Patients. Yeh, W. W., et al. Poster #479. Saturday, Nov. 2, 2013, 2:00-7:30 p.m.

The abstracts were published today and can be accessed on the AASLD website. For program information, please visit:

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 and connect with us on Twitter, Facebook and YouTube.

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. These statements are based upon the current beliefs and expectations of Merck’s management and are subject to significant risks and uncertainties. There can be no guarantees with respect to pipeline products that the products will receive the necessary regulatory approvals or that they will be commercially successful. If underlying assumptions prove inaccurate or risks or uncertainties materialize, actual results may differ materially from those set forth in the forward-looking statements.

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