Overview Sildenafil (Viagra) for the Treatment of Dyskinesias in Parkinson's Disease Status: Terminated Trial end date: 2009-01-01 Target enrollment: Participant gender: Summary This study is to determine if Viagra is effective in reducing dyskinesias in patients with Parkinson's Disease. Phase: Phase 2 Details Lead Sponsor: Loma Linda UniversityTreatments: Sildenafil Citrate