SLV308 for Treatment of Patients With Early Parkinson's Disease

Inclusion Criteria: * Diagnosis of idiopathic Parkinson's Disease, * Early stage of disease, Modified Hoehn \& Yahr up to stage III, * UPDRS motor score (part III) 10 at baseline. Exclusion Criteria: * Diagnosis is unclear or a suspicion of other parkinsonian syndromes, * Patients who have undergone surgery for the treatment of PD, * Presence of dyskinesias, * Motor fluctuations or loss of postural reflexes, * Clinically significant abnormalities, * Patients treated with L-dopa or dopamine agonists currently or in the past (for more than 3 months in total), * Antipsychotic.