Phase 2 Clinical Study of KW-6500 in Parkinson's Disease Patients With Motor Response Complication on Levodopa Therapy
Phase 2 Clinical Study of KW-6500 in Parkinson's Disease Patients With Motor Response Complication on Levodopa Therapy
The purpose of this study is to evaluate the efficacy of KW-6500 versus placebo when
 administered as a subcutaneous injection at the individualized maintenance dose level in an
 OFF state in Parkinson's disease patients with motor response complications on levodopa
 therapy.
The efficacy of KW-6500 as a subcutaneous injection at the individualized maintenance dose
 level (1 mg to 6 mg per dose) when used in combination with domperidone (30 mg/day) will be
 evaluated in comparison with that of placebo in Parkinson's disease patients with motor
 response complications on levodopa therapy. The maintenance dose level for each subject will
 be determined using a titration scheme in 1 mg increments.
Inclusion Criteria:

 -  Men and women aged 20 years or older at the time of giving informed consent.

 -  Patients who have idiopathic Parkinson's disease.

 -  Patients who have been on a stable regimen of levodopa (at least three times daily)
 plus at least one other antiparkinsonian agent being administered or more frequently
 for at least 30 days before the preliminary evaluation and who have predictable
 end-of-dose wearing-off.

 -  Patients who meet both of the following criteria on the Modified Hoehn and Yahr Scale
 during the preliminary evaluation and on the day before starting study drug (Day -1).

 -  Stage IV or V while in the OFF state

 -  Stage II to III while in the ON state

 -  Patients who have experienced a 30% or more improvement in UPDRS Part 3 score when
 tested for responsiveness to levodopa during the baseline period.

 -  Patients who have at least one wearing-off episode per day and a daily average OFF
 time of at least two hours two days before starting study drug (Day -2) and on Day -1.

 -  Patients who can understand the OFF state or have a family member who can understand
 it.

 -  Patients who have given written informed consent. (Alternatively, the patient's
 legally acceptable representative may give written consent following the patient's
 oral consent, if his/her condition makes handwriting difficult.)

 Exclusion Criteria:

 -  Patients with an illness of the cardiac, hematologic, hepatic, renal, pancreatic,
 metabolic, respiratory, gastrointestinal, endocrinologic, or neurologic system or a
 tumor that is clinically significant for their participation in the study.

 -  Patients with orthostatic hypotension.

 -  Patients with a history of drug allergies.

 -  Patients with a history of intolerance to morphine or its derivatives, sulfur,
 sulfur-containing pharmaceutical products, or sulfite.

 -  Patients with a history of malignant syndrome.

 -  Patients with a diagnosis of cancer or evidence of continued disease within five years
 before starting study drug.

 -  Patients who have been taking domperidone at a dose level of more than 30 mg/day since
 before the preliminary evaluation.

 -  Patients who do not test negative in the direct Coombs' test as part of the
 preliminary evaluation.

 -  Pregnant or lactating women, women who are planning to have children, women who test
 positive in the pregnancy test during the preliminary evaluation or on Day -1, or
 women who cannot adhere to a reliable method of contraception throughout the study.

 -  Patients who have received MAO inhibitors except selegiline within three months before
 starting study drug.

 -  Patients with a current or past history of mental disease or dementia (excluding
 psychiatric symptoms associated with Parkinson's disease).

 -  Patients with a Mini-Mental State Examination (MMSE) score of 23 or less on or before
 Day -1.

 -  Patients who are taking antipsychotics or dopamine antagonists.

 -  Patients who are receiving methyldopa, 5-HT3 receptor antagonists, or reserpine.

 -  Patients who are receiving papaverine.

 -  Patients who have had a neurosurgical operation for Parkinson's disease.

 -  Patients who have had transcranial magnetic stimulation (TMS) within six months before
 starting study drug.

 -  Patients with a history of drug or alcohol abuse or dependence (DSM-IV criteria)
 within two years before starting study drug.

 -  Patients previously treated with apomorphine.

 -  Patients who have been treated with any other investigational product within four
 months before starting study drug.

 -  Patients who, for any reason, are judged by the investigator or subinvestigator to be
 inappropriate for this study.