VX-222 is a small molecule non-nucleoside inhibitor of HCV NS5B polymerase that is being investigated for the treatment of hepatitis C virus infection.
Vertex recently completed a multiple-dose Phase 1b study of VX-222. Interim results from the trial were consistent with the findings of a previously-conducted three-day viral kinetic study and support future clinical evaluation of VX-222, including the initiation of the first clinical trial of VX-222 in combination with telaprevir. Additional results from this Phase 1b study of VX-222 are planned for presentation at a medical meeting in 2010. Vertex gained VX-222 as part of its acquisition of ViroChem Pharma Inc. in March 2009.