PF-06669571 In Subjects With Idiopathic Parkinson's Disease

A Phase 1b, Double Blind, Sponsor Open, Randomized, Parallel, Group Multiple Dose Study Examining The Safety, Tolerability, Pharmacokinetics And Pharmacodynamics Of Pf-06669571 In Subjects With Idiopathic Parkinson's Disease.

This study is designed to assess safety, tolerability and pharmacokinetic data for multiple doses of PF-06669571 in subjects with idiopathic Parkinson's disease. In addition, this study will assess whether PF-06669571 is able to demonstrate superior efficacy compared with placebo in the treatment of the motor symptoms of idiopathic Parkinson's disease.

Inclusion Criteria:

• Subjects must have a clinical diagnosis of idiopathic Parkinson's disease and presence of at least 2 out of 3 cardinal characteristics (tremor, rigidity and/or bradykinesia).
• Must be Hoehn & Yahr Stage II-III inclusive and experiencing motor fluctuations in the form of end-of-dose wearing off during the morning hours or early morning akinesia.
• Subjects should be able to recognize their "wearing off" symptoms and verify that they usually improve after their next dose of Parkinson's disease medication. Subjects should be able to recognize drug-induced dyskinesias and verify whether or not they are troublesome.

Exclusion Criteria:

- History or clinical features consistent with an atypical parkinsonian syndrome, (for example: ataxia, dystonia, clinically significant orthostatic hypotension.