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Merck & Co Inc Announces Presentation Of Interim Data From Study Of Investigational Combination Of HCV Therapies MK-5172 And MK-8742


Saturday, 2 Nov 2013 09:00am EDT 

Merck & Co Inc announced the presentation of interim data from the ongoing C-WORTHY Study, a Phase II clinical trial evaluating the efficacy and safety of an all-oral regimen combining once-daily MK-5172, an investigational hepatitis C virus (HCV) NS3/4A protease inhibitor, and MK-8742, an investigational HCV NS5A replication complex inhibitor, with or without twice-daily ribavirin, administered for 12 weeks to treatment-na├»ve, non-cirrhotic patients with HCV genotype 1a and 1b infection. The interim data show that the administration of MK-5172 and MK-8742 in combination is associated with a sustained virologic response (lack of detectable and quantifiable HCV) 12 weeks following the end of study therapy (SVR12). Merck previously announced that the U.S. Food and Drug Administration (FDA) granted Breakthrough Therapy designation to MK-5172/MK-8742 for treatment of chronic HCV infection. In the C-WORTHY Study, 65 patients (45% male, 11% African American, and 58% genotype 1a infection) were enrolled in one of three 12-week treatment arms (see TABLE). The ribavirin (RBV) arms were stratified by genotype 1a versus genotype 1b. The RBV-free arm included only genotype 1b-infected patients. Virologic response was assessed each week during treatment and at 2, 4, 8, 12 and 24 weeks after the end of treatment. The primary efficacy endpoint of the trial was the proportion of patients who achieved sustained virologic response at post-treatment follow-up week 12 (SVR12). 

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