Telaprevir
Telaprevir (VX-950), marketed under the brand names Incivek and Incivo, is a pharmaceutical drug for the treatment of hepatitis C co-developed by Vertex Pharmaceuticals and Johnson & Johnson. It is a member of a class of antiviral drugs known as protease inhibitors. Specifically, telaprevir inhibits the hepatitis C viral enzyme NS3/4A serine protease. Telaprevir is only indicated for use against hepatitis C genotype 1 viral infections and has not been proven to be safe or effective when used for other genotypes of the virus. The standard therapy of pegylated interferon and ribavirin is less effective than telaprevir in those with genotype 1. Clinical trials and approvals In a randomized controlled trial (PROVE3) of patients in whom standard treatment with peginterferon alfa-2a and ribavirin had failed, repeat treatment with the addition of telaprevir was more likely to have a sustained virological response (SVR) than repeat treatment with peginterferon alfa-2a and ribavirin alone ...
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