ViroPharma Incorporated (VPHM)

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7:31AM ViroPharma: Treatment with VP20621 in a Phase 2 study resulted in high rates of colonization and statistically significant reductions in recurrence of C. difficile Infection (VPHM) 26.01 : Co announced the results of a Phase 2 study of VP20621 (non-toxigenic Clostridium difficile; NTCD) a novel treatment approach for preventing recurrent C. difficile infections (CDI). In this study of 168 patients who were randomized and dosed following antibiotic treatment for CDI, VP20621 was well tolerated, with mild-moderate headache the only notable associated adverse event reported by 10 percent of subjects compared to 2 percent on placebo. Viable non-toxigenic C. difficile was detected in stool culture (the primary endpoint of the study) in 54 percent of subjects treated with the low dose of VP20621 and up to 79 percent of those receiving the high dose. In addition, across all dose groups, VP20621 reduced the incidence of CDI recurrence (a secondary endpoint of the study) by greater than or equal to 50 percent vs. placebo, with a similar reduction in antibacterial treatment for CDI vs. placebo in this study. The CDI recurrence rate was two percent (2/86) in the subgroup of patients successfully colonized with VP20621.