Safety, Tolerability and Efficacy of Two Doses of Once Daily P2B001 in Subjects With Early Parkinson's Disease

Inclusion Criteria: * Subject is male or female ≥35 years of age to ≤75 years of age at the time of enrollment. * Subject has idiopathic Parkinson's disease consistent with the UK Brain Bank Criteria; must have bradykinesia with sequence effect and rest tremor or prominent motor asymmetry. * Subject with disease duration no longer than 3 years and 0 months. * Subject has a Hoehn \& Yahr (H\&Y) stage score of \< 3. * Subject has a MMSE score ≥ 26 Exclusion Criteria: * Subject has an atypical parkinsonian syndrome or secondary parkinsonism (e.g., due to drugs, metabolic neurogenetic disorders, encephalitis, cerebrovascular disease or degenerative disease). * Subject has a history of psychosis or hallucinations within the previous 12 months. * Subject who is taking anticholinergic drugs. * Subject has previous exposure to levodopa or a dopamine agonist for longer than 4 weeks; if previous exposure was less than 4 weeks then it must not be within 2 months prior to the baseline visit. * Subject has previous exposure to a MAO-B inhibitor for longer than 4 weeks; if previous exposure was less than 4 weeks then it must not be within 3 months prior to the baseline visit. * Subject who is taking MAO inhibitors, potent CYP1A2 inhibitors, e,g, Ciprofloxacin, Dextromethorphan or antitussive agent, analgesic agents such as tramadol, meperidine, methadone and propoxyphene, strong 3A4 inducers, e.g., St. John's Wort or cyclobenzaprine (tricyclic muscle relaxant), dopamine antagonists, such as the neuroleptics (phenothiazines, butyrophenones, thioxanthenes) or metoclopramide. Probenecid, cimetidine, ranitidine, diltiazem, verapamil and quinidine.