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A Randomized Study of Stopping Treatment at 24 Weeks or Continuing Treatment to 48 Weeks in Treatment-Naïve Subjects with Genotype 1 Chronic Hepatitis C who Achieve an Extended Rapid Viral Response (eRVR) While Receiving Telaprevir, Peginterferon Alfa2a (Pegasys®) and Ribavirin (Copegus®)

Primary:To estimate the difference in SVR rates between T12/PR24 and T12/PR48 treatment regimens in subjects who achieve eRVR.Secondary:To evaluate the safety of telaprevir in combination with Peg-IFN-alfa-2a and RBV in treatment-naïve subjects with…

A randomized, double-blind, placebo-controlled, Phase III trial of 2 regimens of telaprevir (with and without delayed start) combined with pegylated interferon alfa-2a (Pegasys®) and ribavirin (Copegus®) in subjects with chronic genotype 1 hepatitis C infection who failed prior pegylated interferon plus ribavirin treatment.

The primary objective is to demonstrate the superior efficacy of telaprevir in combination withPeg-IFN alfa-2a and RBV compared to standard treatment in subjects with chronic HCVgenotype 1 infection who failed prior treatment with Peg-IFN plus RBV.…

An open-label, single-arm, roll-over trial of telaprevir in combination with pegylated interferon alfa-2a (Pegasys®) and ribavirin (Copegus®) for subjects from the control group of the VX-950-TiDP24-C216 trial who failed therapy for virologic reasons

The objectives are:- to provide access to telaprevir for subjects with chronic HCV genotype 1 infection who wererandomized to the control group in the C216 trial and who failed therapy for virologicreasons;- to evaluate efficacy, safety, and…