GlaxoSmithKline (GSK) And XenoPort (XNPT) Announce Positive Phase IIb Results for GSK1838262 (XP13512) Reported for Neuropathic Pain Associated with Post-Herpetic Neuralgia
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GlaxoSmithKline (NYSE: GSK) and XenoPort, Inc. (Nasdaq: XNPT) announced top-line results from a Phase IIb clinical trial evaluating the safety and efficacy of GSK1838262/XP13512 (gabapentin enacarbil) for neuropathic pain associated with post-herpetic neuralgia (PHN) in adults. In this study, subjects were randomized to receive placebo, 1200, 2400 or 3600 mg/day of GSK1838262 dosed twice a day. All doses of GSK1838262 demonstrated statistically significant improvements over placebo on the primary endpoint, which was the change from baseline to the end of maintenance treatment in the 24-hour average pain intensity score.
This 14-week, double-blind, placebo-controlled study enrolled 376 subjects with PHN who had been experiencing pain for at least three months following healing of the herpes zoster skin rash. The pre-specified statistical analysis included adjustment for comparisons of multiple GSK1838262 doses to placebo. The adjusted p-values for comparison of 1200, 2400 and 3600 mg/day doses to placebo were 0.013, 0.029 and 0.002, respectively.
This 14-week, double-blind, placebo-controlled study enrolled 376 subjects with PHN who had been experiencing pain for at least three months following healing of the herpes zoster skin rash. The pre-specified statistical analysis included adjustment for comparisons of multiple GSK1838262 doses to placebo. The adjusted p-values for comparison of 1200, 2400 and 3600 mg/day doses to placebo were 0.013, 0.029 and 0.002, respectively.
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