A Study of AP-CD/LD in Fluctuating Parkinson's Disease Patients Who Completed IN 11 004

Inclusion Criteria: 1. Subjects who successfully completed the core study IN 11 004 and, in the opinion of the Investigator, would benefit from long-term treatment with AP-CD/LD 2. Continue to carry the diagnosis of Parkinson's disease consistent with UK brain bank criteria 3. Has a good response to Levodopa in the opinion of the investigator 4. Subjects able and willing to give written (signed and dated) informed consent to participate in the study Exclusion Criteria: 1. Participation in another clinical trial other than IN 11 004 and receipt of an investigational medication other than that administered in the context of IN 11 004 within 28 days prior to the planned start of treatment 2. Previous or planned neurosurgical or Duodopa treatment for Parkinson's Disease (e.g., procedures including ablation or deep brain stimulation) 3. Non-selective monoamine oxidase (MAO) inhibitors within 28 days prior to Baseline Visit or planned administration during study participation 4. If, in the opinion of the Investigator, subject should not participate in the study 5. Women who are pregnant or nursing. Women of childbearing potential who are not willing to use a medically acceptable method of contraception.