Long-term Safety Study of Open-label Pramipexole Extended Release (ER) in Patients With Early Parkinson´s Disease (PD).

Inclusion criteria:

1. Completion of the double-blind trial 248.524 or 248.636

2. Male or female patient with early idiopathic Parkinson´s disease (PD), and with a Modified Hoehn and Yahr stage of I to III.

3. Patient willing and able to comply with scheduled visits, treatment plan, laboratory tests and other study procedures.

4. Signed informed consent obtained before any study procedures are carried out (in accordance with International Conference on Harmonisation (ICH) - Good Clinical Practice (GCP) guidelines and local legislation).

Exclusion criteria:

1. Patients prematurely withdrawn from the double-blind trials 248.524 or 248.636.

2. Atypical parkinsonian syndromes due to drugs,metabolic disorders, encephalitis or degenerative diseases.

3. Any psychiatric disorder according to Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM-IV) criteria that could prevent compliance or completion of the study and/or put the patient at risk if he/she takes part in the study.4.History of psychosis, except history of drug induced hallucinations.

5. Clinically significant electrocardiogram (ECG) abnormalities at baseline. 6.Clinically significant hypotension 7.Malignant melanoma or history of previously treated malignant melanoma. 8.Any other clinically significant disease, that could put the patient at risk or could prevent compliance or completion of the study. 9. Pregnancy or breast-feeding.

10. Sexually active female of childbearing potential not using a medically approved method of birth control for at least one month prior to the baseline and throughout the study.11 Serum levels of aspartate aminotransferase (AST) (SGOT), alanine aminotransferase (ALT) (SGPT), alkaline phosphatase or bilirubin \> 2 upper limit of normal (ULN) at baseline 12. Patients with a creatinine clearance \< 50 mL/min (estimated by the Cockcroft and Gault formula). 13. Motor complications under levodopa therapy (e.g. on-off phenomena, dyskinesia) at baseline.

14. Any medication (including intra-muscular formulations) with central dopaminergic antagonist activity within 4 weeks prior to the baseline visit. 15.Any of the following drugs within 4 weeks prior to baseline: methylphenidate, cinnarizine, amphetamines. 16. Flunarizine within 3 months prior to baseline.

17. Known hypersensitivity to pramipexole or its excipients. 18. Drug abuse (including alcohol), according to investigator´s judgement, within 2 years prior to baseline.

19. Participation in investigational drug studies other than trials 248.524 and 248.636 or use of other investigational drug within one month or five times the half-life of the investigational drug prior to baseline.