SANTA CLARA, Calif.--(BUSINESS WIRE)--XenoPort, Inc. (Nasdaq:XNPT) announced today preliminary top-line results of a Phase 2, randomized, crossover clinical trial that compared optimized treatment with either Sinemet (immediate-release levodopa/carbidopa) or XP21279 co-formulated with carbidopa (279/CD) in advanced Parkinson’s disease patients with motor fluctuations. 279/CD dosed three times per day reduced mean daily “off time” by 46% compared to baseline when the patients were taking their pre-trial Sinemet dosing regimen. However, in the primary analysis of the trial, the improvement with 279/CD was not statistically better than the improvement seen with optimized Sinemet dosed four or five times per day during the double-blind phase of the trial.
