The Effects of an NR2B NMDA Antagonist, CP-101,606, in Patients With Parkinson's Disease

A Randomized, Double-Blind, Placebo-Controlled, Crossover Study To Explore The Efficacy And Safety Of The NR2B NMDA Antagonist CP-101,606 In Patients With Idiopathic Parkinson's Disease

To determine the effects of the NMDA antagonist, CP-101,606, in subjects with Parkinson's Disease

Inclusion Criteria:

• 30- 80-year-old PD patients (UK Parkinson's Disease Brain Bank criteria) with a Hoehn & Yahr stage score of 2-5 in the "off" state.

Exclusion Criteria:

• Subjects with evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at time of dosing).