 Inclusion Criteria:Male and female patients with idiopathic PD and who are currently experiencing bothersome drooling United Parkinsons Disease Rating Scale UPDRS item 6, rating of 2 or higher will be eligible for this study. Patients must be on a stable medication regimen for the preceding one-month run-in period. In addition, patients or a caregiver must be able to complete a daily record card, and patients must be able to tolerate an oral dental roll for 5-minute periods for saliva measurements. 