Investigating the efficacy of Vildagliptin in delaying the progression of Parkinson's disease.
1: Patients aged 40 to 75 years who were diagnosed with Parkinson's disease according to the UK Brain Bank criteria within the past three years.
1: The key exclusion criterion is a score of at least 3 on the Hoehn and Yahr scale (ranging from 1 to 5, with higher scores indicating more severe disability), which indicates that Parkinson's disease has led to at least mild to moderate bilateral motor involvement due to some postural instability.